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    Wyświetlanie 1-49 z 49
    Tytuł:
    Investigation of Radiation Absorption Properties of Some India Granites
    Autorzy:
    Mavi, B.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402424.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.85.-m
    78.20.Ci
    Opis:
    The radiation shielding properties of India granites have been investigated. Gamma-ray attenuation coefficients of some India granites were determined for different energies, 662, 1173, and 1332 keV. The results were compared with the calculation of XCOM at the photon energy of 1-10 GeV. Good agreement between experimental and theoretical results has been observed.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-370-B-371
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Radon Concentrations in Pamukkale-Turkey
    Autorzy:
    Kulalı, F.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402504.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.56.B-
    87.66.-a
    Opis:
    Radon is an inert gas produced by the radioactive decay of radium with a half-life of 3.81 days. Radon is the largest source of natural ionizing radiation and every 2.6 km² of surface soil, to a depth of 15 cm, contains approximately 1 gram of radium, which releases radon in small amounts to the atmosphere. On a global scale, it is estimated that 91 TBq of radon are released from soil annually. In this work, the radon concentration in soil gas, which is transported from soil (1 m depth), is measured at five points in Pamukkale and its neighbourhood.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-445-B-446
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation exposure of medical staff in interventional radiology
    Autorzy:
    Kara, Ü.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068118.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.yk
    87.57.uk
    Opis:
    The aim of this study was to assess the radiation dose received by doctors, nurses, X-ray technician medical staff during cardiac catheterization in a representative sample of the staff in our angiography department. Radiation from X-ray machines can cause serious side effects. Radiation exposure of angiography staff (doctors, nurses, medical staff and X-ray technicians) has been recognized as a necessary hazard in angiography department. The purpose of our work is to determine angiography staff radiation doses during interventional radiology, to identify procedures associated with higher radiation doses, and to determine the effects of various parameters on staff doses. This study was performed at Suleyman Demirel University Medical Faculty Hospital. The procedure of study was performed in an interventional radiology department. We have recorded radiation doses data during all related imaging procedures performed as a part of department activity. The distances from the X-ray tube were 0 cm (doctor), 60 cm (nurse), 120 cm (medical staff) and 180 cm (X-ray technician). It is important to understand the radiation effects on medical staff in interventional radiology procedures. Determinants of radiation risk include not only radiation dose levels but also medical staff number, ages, gender and their position. These factors can increase or decrease the risk of exposure.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 404-406
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of ⁴⁰K Concentration in Gravel Samples from Konyaalt i Beach, Antalya
    Autorzy:
    Seçkiner, S.
    Akkurt, İ.
    Günoğlu, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031203.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    23.90.+W
    78.66.SQ
    Opis:
    Terrestrial radioactivity is caused by the radioactive elements, located in various amounts in soil and rocks. The concentration of radioactive elements varies with the geographical and geological structure of the region and with the mineralogical composition of soil and rock. In this study, ⁴⁰K activity concentrations in gravel samples, collected from Konyaaltı Beach, were measured. The measurement was performed using gamma ray spectrometery at gamma spectrometry laboratory of Süleyman Demirel University.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1095-1097
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculation of Detection Efficiency for the Gamma Detector using MCNPX
    Autorzy:
    Akkurt, İ.
    Tekin, H.
    Mesbahi, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402379.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.10.Rt
    29.40.-n
    Opis:
    Radiation detection has been a main interest for researchers as all kind of produced particles in atomic and subatomic physics based on the measurement systems so-called detector. Detection efficiency is one of the main parameter in detection system besides many other different parameters of the detector. The absolute efficiency of the gamma detector system will be used at Turkish Accelerator and Radiation Laboratory at Ankara (TARLA) is simulated using MCNPX code (version 2.4.0). The MCNP is the general purpose MC code that can be used for neutron, photon, electron or coupled neutron, photon, electron transport. The results have been obtained for NaI(Tl) detector system and compared with the experimental results. A good agreement was found between calculation and experiment.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-332-B-334
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Gamma-ray Attenuation Coefficients at Different Energies in Amasya Marbles
    Autorzy:
    Mavi, B.
    Oner, F.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402432.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    28.41.Qb
    07.85.Nc
    Opis:
    The linear attenuation coefficients of different marble samples (Perlato Beige, Regal Beige and Crema Siva Beige) produced in Amasya were measured. The measurements have been performed at the photon energies of 511, 835 and 1274 keV which were obtained using $\text{}^{22}Na$ and $\text{}^{54}Mn$ sources. The measurements have been performed using a gamma spectrometer which contains 3"×3" NaI(Tl) detector connected to 16384 channel Multi-Channel-Analyser (MCA).
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-395-B-396
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of double differential cross sections of (γ,p) reaction for ¹²C nuclei
    Autorzy:
    Karpuz, N
    Mavı, B.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068191.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    5.20.x
    32.80.Cy
    Opis:
    Photonuclear reaction data, is important for basic and applied research. In additional to this, double differential data is especially vital in the field of nuclear medicine. The increase in the number of patients, admitted for treatment of cancer with heavy ions, poses a serious problem in terms of the risk of secondary cancer, as a result of exposure to particles of different energy and angle values, released after the nuclear reaction. The main point here is the possibility of damaging organs other than the treated one by the radiation generated in the reactions during the heavy ion therapy. Based on this, in order to assess the risk of secondary cancer the investigations of the double differential cross sections of reaction are required. Double differential cross sections of (γ,p) photonuclear reaction for ¹²C nuclei were calculated as functions of incoming photon energy and angle. Nuclear reaction simulation program TALYS 1.2 was used in the calculations. The calculated cross sections were compared with both the experimental cross sections and the evaluated cross sections available in literature.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 313-315
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Radiation Exposure Dose from Nuclear Medicine Procedures (Tc-99m MAG-3)
    Autorzy:
    Kara, U.
    Yildiz, M.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031923.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.yk
    87.57.uk
    Opis:
    Nuclear medicine is great for viewing the roles of body organs. Medical imaging in nuclear medicine takes radioactive pharmaceuticals and studies their path of progress through patient's body. The principles of nuclear medicine are different from those of diagnostic radiology. The nuclear medicine can study the functioning of body and how it actually works. On the other hand, usage of different kinds of radiopharmaceuticals in nuclear medicine examinations can affect the dose rates. The purpose of our investigation was to estimate the effective dose from most common procedures, performed in nuclear medicine departments. We noted the injection radiation doses, which are used for diagnosis in nuclear medicine clinics. Later patient radiation doses were calculated, according to models recommended in ICRP 106.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 883-885
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monte Carlo Simulation Studies of Collimator Parameters for TARLA Bremsstrahlung Facility
    Autorzy:
    Kuluöztürk, Z.
    Demir, N.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031457.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.05.Tp
    02.70.Uu
    29.17.+w
    Opis:
    In this work, calculations of the design of bremsstrahlung photon collimator within the scope of the Turkish Accelerator Center Project are presented. At TARLA facility (Turkish Accelerator Radiation Laboratory at Ankara), bremsstrahlung photons created by the accelerated electron beams, are transferred to the experimental area through the collimator, which has a conical geometry with length of 320 cm. In this study, Al, Fe and Cu materials were selected as collimator materials. All interactions between the collimator materials and Gaussian photon beam in 8-32 MeV energy range (8 MeV, 16 MeV, 24 MeV and 32 MeV) were taken into account. The entry radius, geometry and chosen materials are important parameters for collimator design. The photon fluence from collimator, secondary particle distributions and the number of photons, scattered from the collimator, were calculated as functions of these parameters. All calculations were made with the Monte Carlo code FLUKA. According to the results of these simulations, collimator with conical geometry, made of aluminium, with 0.25 cm entry radius, was determined to be appropriate for TARLA bremsstarhlung photon facility of Turkish Accelerator Center.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 796-800
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of natural radioactivity and associated radiological hazard in excavation field in Turkey (Oluz Höyük)
    Autorzy:
    Çetin, B.
    Öner, F.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1070198.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.40.-n
    29.85.Fj
    Opis:
    The level of natural radioactivity may be varied with the increase in dependence of the depth into the earth. In present study, soil samples from different depths were collected in Oluz Höyük excavation area. The radionuclide concentrations in soil samples were determined by gamma-ray spectrometer which contains 3" × 3" NaI(Tl) detector connected to multichannel analyser. The photopeaks at 1460, 1764, and 2615 keV due to ⁴⁰K, ²²⁶Ra and ²³²Th, respectively, have been used. The obtained activity concentrations of ⁴⁰K, ²²⁶Ra and ²³²Th ranged from 656.03 to 1791.85 Bq/kg, 62.39 to 180.93 Bq/kg and 48.31 to 125.43 Bq/kg, respectively. To assess the radiological hazard of the natural radionuclides content in the soil samples of these area, the radium equivalent activities (the minimum value was 181.99 Bq/kg and the maximum value was 497.97 Bq/kg), the absorbed dose rate (the minimum value was 86.83 nGy/h and the maximum value was 237.22 nGy/h), annual effective dose rate (the minimum value was 0.11 mSv/y and the maximum value was 0.29 mSv/y) and external hazard index (the minimum value was 0.49 and the maximum value was 1.35) were calculated using measured activities.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 475-478
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monte Carlo Simulation of Photoneutron Dose in Radiotherapy Room as A Function of Gantry Angles
    Autorzy:
    Kara, Ü.
    Mesbahi, A.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402427.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.10.Rt
    87.16.af
    Opis:
    Using bremsstrahlung photon is one of the principal means to treat cancer. Bremsstrahlung photons are created in medical LINAC and the interaction of bremsstrahlung photon with the heavy nuclei that constitute the linac head shielding is the main process of neutron production inside the treatment rooms. The threshold of the neutron production for those materals is about 10 MeV. As the neutron is more dangerous than photon it is important to determine neutron dose during radiotherapy treatment. The neutron distribution depends on some parameters such as gantry angle. In this study neutron dose rate has been simulated as a function of gantry angle.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-378-B-380
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of the radon levels in groundwater and thermal springs of Pamukkale region
    Autorzy:
    Kulalı, F.
    Akkurt, I.
    Özgür, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065372.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    92.40.Kf
    92.40.Qk
    01.50.My
    Opis:
    Radon, which is the largest source of natural ionizing radiation, reaches surface as gas form or solvated in the ground water. Emanation of radon can has a profile which is disposed to increase or decrease depending on the effects of meteorological events or crust movements. Pamukkale, which was involved previously in the world heritage list of UNESCO, and the surrounding area have many groundwater and thermal springs that carry dissolved radon to surface. The aim of this study was to investigate the variations of radon in the water samples of the region.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 496-498
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation dose in dental radiology
    Autorzy:
    Kara, Ü.
    Yıldırım, D.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065693.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.yk
    87.57.uk
    Opis:
    The radiation is used in a wide range of medical fields, in diagnosis and treatment. Certain body parts, like thyroid, are more specifically affected by exposure to different types of radiation sources. The thyroid is highly susceptible to radiation carcinogenesis and exposure to ionising radiation is the only established cause of thyroid cancer. In this study, we have examined radiation doses measured during diagnosis which used dental panoramic radiography. The measurement has been performed in the Suleyman Demirel University, at PlanmecaProMax 3D (cone beam) imaging unit. The device operates at 66-70 kV, 8-10/22 mA/s.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 407-408
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation Protection in PET Room
    Autorzy:
    Kara, Ü.
    Tekin, H.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402426.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.yk
    87.57.uk
    Opis:
    Applications of radiation in medicine is based on the radiation ability of destroing the tumor cells and creating the images of internal organs. This two features play an important role in the diagnosis and treatment of diseases by radiation. In medicine X-ray and radionuclides being sources of gamma rays as $Tc^{99m},$ $I^{137},$ or $Tl^{201}$ are used for the diagnosis of diseases, as beta particles uses for the treatment of diseases. In nuclear medicine radioactive isotopes are built into pharmaceuticals and create radiopharmaceuticals. Radiopharmaceutical administered to patient gathers in examined organ and gives information on functional and anatomical status of the organ. Radiation workers prepare radiopharmaceuticals, transport it, implement, take diagnostic images and survey the therapy. Their radiological protection is very important. Efficient radiation protection can be achieved by factors of time (reduce the time spent close to radioactive source to minimum), distance (keep maximal distance to radioactive source), and shielding (sufficient amount of protective material placed between the source and body) concepts are the basis.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-375-B-377
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photoneutron Dose Measurement in Radiotherapy Room
    Autorzy:
    Kara, Ü.
    Mesbahi, A.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402425.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.56.-v
    87.55.Qr
    Opis:
    Cancer is one of the main disease to threat for human health. Besides surgery and medical treatment (chemotherapy), radiotherapy is commonly used treatment method to kill cancer cell. For this method high energy photon is required. Clinic Lineer Accelerator (cLINAC) relatively lower energy than other LINAC has been used to obtain photon via bremsstrahlung processes. When accelerated electron beam impinges to the thin target bremsstrahlung occurs and photon can be created. Those photons can be focused on cancer cell and kill cancer. In order to focus photon beam collimator materials in LINAC head generally contains heavy elements is used and the interaction of bremsstrahlung photon with the such heavy nuclei the neutron can be produced inside the treatment rooms. The threshold of the neutron production for those materals is about 10 MeV. As the neutron is more dangerous than photon it is important to determine neutron dose during radiotherapy treatment. In this study neutron dose rate has been measured and simulated in radiotherapy room.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-372-B-374
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculation of Gamma Strength Functions for Photonucleon Reactions
    Autorzy:
    Karpuz, N.
    Mavi, B.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402486.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    24.10.-i
    25.20.-x
    Opis:
    The cross section for (γ,N) reaction is important for investigation of nuclear structure, especially in low-energy giant dipole resonance (GDR). The total cross sections of $\text{}^{12}C(γ,n)^{11}C$ and $\text{}^{12}C(γ,p)^{11}B$ reactions, calculated using TALYS 1.2 nuclear code, are 15.5 to 40 MeV and 15 to 110 MeV, respectively. In the calculations, the default pre-equilibrium models and Brink-Axel Lorentzian model in all of the gamma strength functions have been used. The effects of the gamma strength function on the cross section exchange data has determined the most compatible model type. The results are compared with the experimental data from the EXFOR database and the evaluated nuclear data from TENDL-2012. Our calculated results are in good agreement with the previously reported experimental results.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-414-B-416
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Excitation functions of (d,n) reactions on some light nuclei
    Autorzy:
    Noori, S.
    Karpuz, N.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068511.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.45.De
    24.10.Lx
    Opis:
    Nuclear reactions of the induced deuteron particles with light nuclei have been investigated in the history of nuclear physics. In this study, excitation functions for the deuteron reactions ⁶Li(d,n)⁷Be, ¹²C(d,n)¹³N, ¹⁶O(d,n)¹⁷F have been calculated by using Monte Carlo nuclear reaction simulation code TALYS 1.6, considering equilibrium and pre-equilibrium effects. The calculated theoretical (d,n) excitation functions are compared to the experimental reaction cross-sections in the literature.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 484-486
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Computed tomography routine examinations and the related risk of cancer
    Autorzy:
    Kara, Ü.
    Tekın, H.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1070443.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.56.-v
    87.55.Qr
    Opis:
    Computed tomography is an imaging process that uses x-ray equipment to create detailed scans, of areas inside the body. A picture created during computed tomography process shows the organs, bones, and other tissues in a thin "slice" of the body. Computed tomography is used in cancer diagnosis in many different ways to detect abnormal growths, helps to diagnose the presence of a tumor, provides information about the stage of cancer, determines exactly where to perform a biopsy procedure. The x-rays, gantry around the head, chest or another body part, helps to make a three-dimensional image that is much more detailed than pictures from other x-ray machines. Computed tomography imaging involves the use of x-rays, which are a form of ionizing radiation. Exposure to ionizing radiation is known to increase the risk of cancer. The aim of this study was to assess the radiation exposure received during computed tomography in a representative sample of patients.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 409-411
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on radiation in operating room in Suleyman Demirel University
    Autorzy:
    Kara, Ü.
    Kara, Y.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1068182.pdf
    Data publikacji:
    2016-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.56.-v
    87.55.Qr
    Opis:
    Despite the use of ionizing radiation and most of the harmful effects commonly known but not shown, insufficient attention has been observed for radiation protection. Radiation-exposed patients, physicians, health care team and staff should receive training in this field. The aim of this study is the doses of radiation in the operating room to identify and inform health personnel in radiation protection. Radiation exposure to operating room staff (doctor, nurse, medical staff, X-ray technician, anaesthesia technician, etc.) has been recognized as a necessary hazard in operating room. The purpose of our work is to determine operating room staff radiation doses for operating room to identify procedures associated with higher radiation doses, and to determine the effects of various parameters on staff doses. This study was performed at Suleyman Demirel University Medical Faculty Hospital. The procedure of study was performed in department of anaesthesia. We recorded that radiation doses data include all related imaging performed as part of department procedure. The distances were 100, 150, 250 cm from X-ray tube. It is important to understand that radiation affects medical staff in operating procedures. Use of low doses of ionizing radiation does not have knowledge of the long-term results but we need to be careful to conclude that use of radiological protection. During radiation protection, the maximum dose, even under the thick, the minimum degree of exposure to radiation is an important factor for our health. In addition, in the study, Philips BV-25 Gold is used as a brand fluoroscopic device. Device, 1.2-2 kV, 60-100 mA/s of doses between the values.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 1; 401-403
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variation of Energy Resolution with Distance for a NaI(Tl) Detector
    Autorzy:
    Akkurt, İ.
    Arda, S.
    Gunoglu, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402489.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.40.-n
    29.30.Kv
    Opis:
    As the nuclear radiation has started to be used in a variety of different fields, it is important to be protected from it, and thus the radiation measurement becomes vital. The quality of the performance of a detection system, used for the energy measurements, is important. It is characterized by the width of the pulse-height distribution, obtained for the particles of the same energy (monoenergetic source). The energy spectrum of a radiation source depends on the type and energy of the incident particle and the type of the detector. In this work the energy resolution of a 3"×3" NaI(Tl) detector has been measured for photon energies of 511, 662, 835, 1173, 1275, and 1332 keV, and its variation with the detector-source distance was investigated. The energy resolution of a detector system is obtained from the peak full width at one-half of the maximum height (FWHM) of a single peak (for a particular energy) as a function of detector-source distance. It was found that the energy resolution has decreased with the increasing distance.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-422-B-423
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Energy Deposition and Dose Distributions on Collimator under Photon Beam
    Autorzy:
    Demir, N.
    Kuluöztürk, Z.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402435.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.27.-a
    29.20.Ej
    Opis:
    The bremsstrahlung photon facility where photon beam can be created via bremsstrahlung processes has been installed in many different accelerator in the world. TARLA (Turkish Accelerator and Radiation Laboratory at Ankara) will be first facility of TAC (Turkish Accelerator Center) project in Turkey. An optimal design of collimator is important for obtain a clean high energy photon beam in a bremsstrahlung facility. In this study the photon spectrum has been obtained depending on the entrance angle of the collimator. The energy deposition and dose distributions on the collimator by photon beam generated from 30 MeV energy electron beam have been calculated with FLUKA Monte Carlo simulation code.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-400-B-402
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Angular Distribution of Bremsstrahlung Photons in Ta Target for 40 MeV Electron Beam
    Autorzy:
    Demir, N.
    Kuluöztürk, Z.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402503.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Jj
    23.20.En
    Opis:
    Bremsstrahlung photons are created by electron beams de-accelerating in electric field (coupling with a thin radiator) and are used in a variety of different fields. In nuclear physics experiments it is important to transport and focus the created photon beam into the experimental cavity. Here angular distribution of the photon beam is one of the important parameters, which should be known. In this study a FLUKA simulation has been done to obtain angular distribution of photon beam created by interaction of 40 MeV electron beam with the tantalum (Ta) radiator of varied thickness, which is planned to be used in bremsstrahlung photon facility at TARLA (Turkish Accelerator and Radiation Laboratory in Ankara). TARLA will be the first facility of Turkish Accelerator Center project.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-443-B-444
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Meteorological Parameters on Radon Concentration in Soil Gas
    Autorzy:
    Kulali, F.
    Akkurt, I.
    Özgür, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031284.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.40.Mc
    47.70.Mc
    92.90.+x
    Opis:
    The production of ²²²Rn depends on the activity concentrations of ²²⁶Ra in the earth's crust, in soil, rock and water. Radon concentration levels are strongly affected by atmospheric influences such as rainfall, real humidity, temperature and barometric pressure, rather than by chemical processes, as it is an inert gas. In particular the exhalation of radon is positively correlated with moisture content, temperature and negatively with pressure, so that these factors must be considered in the determination of exhalation rates in environmental measurements. In this study, radon concentrations in soil gas were continuously monitored for nine months in ten minutes periods, using AlphaGUARD system and the fluctuations of radon concentration were compared with the regional meteorologic data, using time graphs.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 999-1001
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Excitation Functions of Longer and Shorter Lived Radionuclides
    Autorzy:
    Noori, S.
    Akkurt, İ.
    Demir, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031916.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    Radionuclides
    Gamma Irradiation
    TALYS 1.6 nuclear reaction simulation code
    Opis:
    Nuclear reactions, which are very important from the point of view of human health, may occur during the production of the radiation sources, used in radiotherapy. The nuclear reaction data are needed in the radioisotope production procedure. The total cross section is also important in accelerator technology, in view of radiation protection and safety. In general, the significance of the cross section data for nuclear reactions in radionuclide production programs is firmly established. Gamma irradiation tracers can offer a large amount of information about the anatomy of different organs in the human body. The main purpose of this work was to compare the cross section of longer-shorter lived radionuclides. Theoretical excitation functions have been calculated with TALYS 1.6 nuclear reaction simulation code. The calculated results have been discussed and compared with the experimental data.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1186-1188
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculations of Temperature Rise in Al, Cu and Fe Photon Collimators for 8-32~MeV Photon Beams
    Autorzy:
    Kuluöztürk, Z.
    Demır, N.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031714.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.05.Tp
    02.70.Uu
    29.17.+w
    Opis:
    We have focused on temperature changes in the collimator at the TARLA bremsstrahlung photon facility. One of the important parameters during the design of an ideal collimator, especially for high-energy photons, is temperature rise in the collimator material. For this purpose, energy deposition in the collimator materials was simulated using the FLUKA Monte Carlo code. Depending on energy deposition values, temperature rise in the collimator materials of Al, Cu and Fe was calculated for photon beams with 8-32 MeV energies.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1168-1170
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Performance of Boron-Carbide as Radiation Shielding
    Autorzy:
    Kara, Ü.
    Tekin, H.
    Calik, A.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402380.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.58.Ji
    87.57.U-
    Opis:
    Radiation is widely used many fields, especially in medical science. The shielding is the basic method of protection against unnecessary influence of radiation. One of the tools most commonly used in nuclear medicine is vial pig container. Usually lead is used as shielding material in vial pigs to cover radiation source, such as $Tc^{99m}$ which is the most widely used radiopharmaceutical in nuclear medicine. In this study boron carbide has been tested as an substitute of lead in vial pig. The measurement has been performed with the Geiger-Müller counter and the personal combined radiation detectors.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-335-B-336
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cross Sections Calculation of (γ,N) Reactions for Some Elements
    Autorzy:
    Karpuz, N.
    Boz, M.
    Mavi, B.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402484.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    24.10.-i
    25.20.-x
    Opis:
    Photonuclear processes can play an important role in the detection of nuclear materials. For this purpose, in this study, the (γ,n) and (γ,p) cross sections as functions of photon energy in medium weight nuclei were calculated. Calculations have been made of the cross sections for some of the (γ,n) and (γ,p) reactions in $\text{}^{28}Si,$ $\text{}^{32}S,$ $\text{}^{56}Fe$ and $\text{}^{63}Cu$ nuclei using the TALYS 1.6 nuclear code with incident photons of 7-40 MeV. These calculated cross sections are compared with each other and with the earlier experimental results from the literature (EXFOR). Calculated results ($\text{}^{56}Fe(γ,n),$ $\text{}^{63}Cu(γ,n),$ $\text{}^{56}Fe(γ,p)$ and $\text{}^{63}Cu(γ,p)$ cross sections) are in very good agreement with the experimental data. However, because of the Coulomb barrier, the photoproton cross sections for $\text{}^{32}S,$ $\text{}^{56}Fe$ and $\text{}^{63}Cu$ target nuclei, are smaller than the photoneutron cross sections.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-411-B-413
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radioactivity Measurement on Dental Resin Composites
    Autorzy:
    Akkurt, İ.
    Ermiş, R.
    Baş, P.
    Günoğlu, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402383.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.30.Kv
    29.40.Mc
    98.70.Vc
    Opis:
    Radioactivity is mainly due to natural ones from earth and also from outside of the atmosphere so-called cosmic radiation. Although radiation sources and their dose effect on humans are known, there is still some conflict on their health effect especially on dental restoration. The limited data for radioactive dental materials and their potential risks for patient makes those materials interesting to be investigated. For this purposes, uranium, thorium and potassium activity have been measured in some dental restorative materials, such as resin composites containing silica and zirconia particles as filler loading, using gamma spectrometer system with NaI(Tl) detector.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-34-B-36
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Radiation Shielding Properties of Cotton Polyester Blend Fabric Coated with Different Barite Rate
    Autorzy:
    Kilincarslan, S.
    Akkurt, I.
    Uncu, I.
    Akarslan, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398803.pdf
    Data publikacji:
    2016-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.88.+h
    Opis:
    Using radiation in industry and medicine brings its hazardous effects. On account of this, people have started to be exposed to extra radiation. Thus radiation protection is developed in parallel with the utilization of radiation. In order to be protected from radiation three different criteria have to be taken into account, these are time, distance and the shielding. Shielding is the most effective way. An effective shield should cause a large energy loss on a small distance without emission of more hazardous radiation. In the world, more than three-hundred nuclear facilities have been used to fulfill the needs in the fields of scientific research, energy, agriculture and industry. In addition to this in medical centres radiation beams have been used for treatment and diagnosis. It is extremely important to protect the human body from radioactive rays. Barite is a mineral which can be used for shielding because of barium, which is a high atomic number element. The shielding property of barite is utilized in fabrics. Barite coated fabrics having characteristics of retaining radiation was obtained by penetrating barite into the fabrics via coating method. The linear attenuation coefficients (μ) of the coated barite fabrics were measured at the photon energies of 662, 1173 and 1332 keV obtained from ^{137}Cs and ^{60}Co γ-ray sources, respectively. As detailed elsewhere, the measurement has been performed using the gamma spectrometer that contains NaI(Tl) connected to 16k channels multi-channel-analyser. In this study, cotton polyester blend fabric was used. To apply barite mineral to fabric via coating method, it was grinded to a size of 2-10 microns by using jaw crushers. FK 800/N type transparent compound was used as adhesive. The coated fabrics were prepared with different volumes of barite. For this purposes four different types of fabrics have been produced, where the rate of barite was 0%, 40%, 50% and 60%. The results of experiments show that barite coated fabrics have blocked radiation. When barite ratio increases, the amount of absorbed radiation also increases.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 4; 878-879
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Radiation Attenuation Coefficients of Concretes in Different Densities
    Autorzy:
    Akkurt, İ.
    Günoğlu, K.
    Başyiğit, C.
    Akkaş, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399938.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.30.Kv
    34.50.Bw
    Opis:
    The density of the concrete is important parameter for different properties. Using different types and rates of aggregates cause different densities of the concretes. Radiation shielding properties can be varied with the density and it is important to obtain optimum density for this purpose. In this study radiation attenuation coefficients were measured by comparison of five different densities of concrete that called lightweight, semi-lightweight, ordinary and semi-heavyweight and heavyweight. For this purpose concretes were produced with suitable aggregate in laboratory conditions and determined some physical and mechanical properties. The total linear attenuation coefficient measurements have been obtained by a collimated beam of gamma ray from sources ^{60}Co.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 374-375
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Measurement of Gamma Dose in Radiotherapy Unit
    Autorzy:
    Akkurt, İ.
    Kara, Ü.
    Yildiz, M.
    Kaya, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402422.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.56.-v
    87.55.Qr
    Opis:
    Cancer is one of the most deadly diseases posing threat for our health. The most important method for eradicating of cancer cells is photoradiotherapy. Electrons accelerated by the accelerator are converted to photons in the process of bremsstrahlung. These photons are focused on diseased cells. Photon leaving accelerator head should assure a given dose intensity in cancer cells. Measuring of beam parameters at apparatus output is essential to determine the dose. In this study, Suleyman Demirel University research and education hospital in radiation Oncology department which has located at 18 MeV accelerator in energy gamma dose was measured.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-367-B-369
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variation of Photoneutron Cross Section with Mass Number
    Autorzy:
    Karpuz, N.
    Boz, M.
    Mavi, B.
    Akkurt, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402482.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.20.-x
    13.85.Lg
    Opis:
    Photonuclear reactions play an important role in many different subfields of nuclear astrophysics, and fields, such as nucleosynthesis applications. The photonuclear reaction cross sections, especially the photoneutron reaction cross sections, are the fundamental properties of nuclear systems. In this study, theoretical evaluation of photoneutron reaction cross sections for 27 ≤ A ≤ 238 targets ($\text{}^{27}Al,$ $\text{}^{96}Mo,$ $\text{}^{181}Ta,$ $\text{}^{238}U$) have been investigated in the incident photon energy range of 7-35 MeV. Monte Carlo code TALYS 1.6 was used to calculate the photoneutron cross sections. The results are compared with the earlier experimental reports in literature and the cross section data in the TENDL-2013 nuclear reaction data library, based on subsequent versions of the TALYS nuclear code system. The photoneutron cross section results and the effects of the mass number of target nuclei are discussed.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-409-B-410
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adult Patient Radiation Doses with Multislice Computed Tomography Exam: MSCT Standard Protocols
    Autorzy:
    Kara, U.
    Kaya, A.
    Tekin, H.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031766.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.yk
    87.57.uk
    Opis:
    Radiation is energy, and it is widely used in a variety of fields, especially in industry and medical science. In hospital, ionizing radiation like X-ray is an extensive exam that has been used to help physicians to have a view into the body, without having to make a medical application. Computed tomography scan uses ionizing radiation, and it is a nearly perfect diagnostic unit that allows the physician to see the picture of the human body. Computed tomography scan technology has progressed over the years, and it is an increasingly powerful and effective unit in the diagnostic radiology. Exposure to ionizing radiation is known to increase the risk of cancer. The aim of this study was to assess the radiation exposure received during computed tomography in a sample representative of the current state of practice in adult patients.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1126-1127
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Buildup Factor in Gamma-Ray Measurement
    Autorzy:
    Akyildirim, H.
    Waheed, F.
    Günoğlu, K.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031578.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    Gamma-rays measurement
    Radiation protection
    Buildup factor
    Gamma Spectrometer
    Geometry
    Opis:
    Gamma ray measurement is an important issue in nuclear technology, since it is widely used in industry, medicine, agriculture, education research, and some military applications. Gamma ray is also needed to build radiation protection, which is very useful for human health. When gamma radiation penetrates through shielding material, it generates two radiation components within or beyond the shield, namely: the uncollided and the collided photons. Therefore, the buildup factor is an important parameter for gamma ray measurement. Buildup factor is defined as the ratio of the total number of particles at a given point to the number of uncollided particles, at that same point. In this work, we evaluate the gamma-ray buildup factors for copper (Cu-29), as a function of energy, for 0.511, 0.662, 1.275 MeV, by using cesium and sodium radioactive sources. The results show that the value of energy buildup factor decreases with increasing gamma energy, and increases with increasing thickness. Moreover, it was found that at high energies (1.275 MeV), the absorption buildup factor is at minimum when the energy is at high level. The results also reveal that there is no contribution from the scattering photons to the value of buildup factor, in general, at low intensity levels, when the geometry structure is built well. While for bad geometry, the detector measures intensity, which is greater than that described by the main linear attenuation coefficient, because the scattered photons will be detected as well. All in all, in order to get rational results, a well geometry should be used for the future applications.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1203-1206
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Radiation Shielding of Concrete Produced from Portland Cement with Boron Additives
    Autorzy:
    Davraz, M.
    Pehlivanoğlu, H.
    Kilinçarslan, Ş.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031870.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Gt
    28.41.QB
    Opis:
    Concrete is a material which is widely used for neutron shielding in such building constructions as nuclear power stations, particle accelerators and medical hospitals. Concrete is very significant for neutron shielding, because is contains some elements which help to moderate very penetrative fast neutrons. Boron increases the neutron shielding effectiveness of concretes. Boron can be added to concrete in different ways, by addition of boron to the water, used in concrete, or by addition of boron containing natural minerals. In this study, three samples of concrete were produced using B₂O₃ additives material, boron-modified active belite and Portland cement. Neutron absorption coefficients of the produced three different types of concrete samples were obtained through experiments. It is concluded that the addition of boron to concrete is an alternative option to be used for the purposes of neutron shielding.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 702-704
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Natural Radioactivity from $\text{}^{232}Th$ with Gamma-Ray Spectrometer in Dereköy-Yazır (Southwestern Anatolia)
    Autorzy:
    Uyanik, N.
    Öncü, Z.
    Uyanik, O.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402500.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    92.20.Td
    29.30.-h
    Opis:
    This study presents new data on the baseline concentrations of Thorium over the Dereköy-Yazır (Ağlasun-Burdur) volcanic area. Portable gamma-ray spectrometer was used for natural thorium mapping. In situ measurements were made in the field, in the area of 7.5 km² at 165 points. Variations in the Th concentration in the surficial environment of the Dereköy-Yazır region appear to be related to bedrock lithology. The measured thorium concentration varies between 0.68-36 ppm, in the studied area. The highest concentration values were obtained from volcanic rocks. The outcropping volcanic rocks in the region are Pliocene alkaline basalts.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-441-B-442
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calculations of Double Differential Cross Sections on ⁵⁶Fe, ⁶³Cu and ⁹⁰Zr Neutron Emission in Proton Induced Reactions
    Autorzy:
    Karpuz Demir, N.
    Çetin, B.
    Akkurt, İ.
    Noori, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031939.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    13.85.Lg
    13.87.Ce
    Opis:
    In general, the deep understanding of proton-induced reactions is a crucial step for the further development of nuclear reactions theory. However there has been an interesting focus in nuclear physics. Some applications require accurate nuclear reaction data of common cross sections and especially need the data of neutron and proton induced energy-angle correlated spectra of secondary particles, as well as double differential cross sections. Double-differential nucleon-production cross-sections of ⁵⁶Fe, ⁶³Cu and ⁹⁰Zr targets, bombarded with protons are calculated based on the nuclear theoretical models. Monte Carlo calculations with the TALYS 1.6 nuclear reaction simulation code are performed. Theoretical calculated results are compared with existing experimental data in EXFOR library.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1181-1185
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation Shielding Properties of Shotcrete
    Autorzy:
    Gunoglu, K.
    Akkurt, I.
    Basyigit, C.
    Çakıroğlu, M.
    Akkaş, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1218135.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.30.Kv
    34.50.Bw
    Opis:
    Shotcrete is a concrete spraying of concrete or mortar that may be accomplished through either a dry- or wet-mix process. It is made of normal weight aggregates which have a density of approximately 2323 kg/$m^3$. For the most part, shotcrete is used in underground excavations in rock and repair work in constructions. In this study, linear attenuation coefficient (μ, $cm^{-1}$) was measured for shotcrete produced with dry mix process. Measurements were carried out by gamma spectrometry containing NaI(Tl) detector and multichannel analyzer.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 299-300
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cement Paste as a Radiation Shielding Material
    Autorzy:
    Akkurt, İ.
    Günoğlu, K.
    Başyiğit, C.
    Kılınçarslan, Ş.
    Akkaş, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399879.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.30.Kv
    34.50.Bw
    Opis:
    Cement, mainly, natural limestone and clay mixture after being heated at high temperature is obtained by milling and it is defined as a hydraulic binder material. Especially, cement is used in production concrete. The photon attenuation coefficient (μ, $cm^{-1}$) for cement paste has been measured using gamma spectrometer containing NaI(Tl) detector and MCA at 835, 1173, and 1332 keV. Cement paste was prepared with types of Portland cement which is CEM I 52,5 R- and CEN reference sand has been used according to TS EN 196-1 standard. The mass attenuation coefficients have been calculated at photon energies of 1 keV to 100 GeV using XCOM and the obtained results were compared with the measurements at 835, 1173, and 1332 keV.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 341-342
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation Protection by the Barite Coated Fabrics via Image Processing Methodology
    Autorzy:
    Akarslan, F.
    Molla, T.
    Akkurt, İ.
    Kilinçarslan, Ş.
    Üncü, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1195237.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.88.+h
    28.41.-i
    Opis:
    According to developing technology and conditions of modern life, use of radiation is rapidly increased. Unwittingly, our organs and tissues are exposed to radiation continuously. In order to avoid exposure to this radiation, some studies were carried out on protective clothing. In this study, radiation keeping properties of the fabrics coated with barite are examined. Radiation keeping properties were also determined by the method of image processing. After the experiments, it is determined that barite-coated fabrics absorb radiation better than normal fabrics.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 316-318
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photon Attenuation Coefficients of Iron Doped Clay at 662~keV
    Autorzy:
    Akkurt, I.
    Mavi, B.
    Gunoglu, K.
    Akyıldırım, H.
    Canakci, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399880.pdf
    Data publikacji:
    2013-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    29.30.Kv
    34.50.Bw
    Opis:
    After discovery of the radioactivity by Becquerel, radiation started to be used in large fields and it became part of our life nowadays. Using radiation from industry to medicine brings its hazardous effect and radiation protection developed in physics in parallel with the utilization of radiation. Although time, distance and shielding are the main rules to be protected from radiation, shielding is most effective way. In this case development of shielding materials becomes important. Clay is an interesting material and besides using it for different purposes it can be used as plaster material in building construction. In this study iron doped into clay samples and radiation shielding properties has been measured at 662 keV gamma rays. The measurements have been performed using gamma spectrometer system which contains NaI(Tl) and 16k multichannel analyser.
    Źródło:
    Acta Physica Polonica A; 2013, 123, 2; 343-344
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Pumice Rate on the Gamma Absorption Parameters of Concrete
    Autorzy:
    Akkurt, I.
    Akyildirim, H.
    Mavı, B.
    Kilinçarslan, Ş.
    Başyığıt, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490936.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    14.70.Bh
    25.20.Dc
    Opis:
    Since the technology concerning gamma radiation showed a rapid development, it became a necessity to be protected from it. One of the common shielding materials for this purpose is concrete. This study aims to give the effect of pumice rate on the gamma radiation attenuation coefficients of normal concrete (ρ = 2.476 g $cm^{-3}$) containing different rates of pumice mineral. Pumice, for which the Gölcük region in Isparta province is rich, is a volcanic originated spongy and porous mineral. Although it is a light material, it has a high comprehensive strength and heat resistance. So it became a common construction material in buildings. In the study, the variation of attenuation coefficients for concretes of different pumice rates were measured for 662, 1173 and 1332 keV photons using a NaI(Tl) detector. The experimental values were compared with the theoretical ones obtained by XCOM code.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1; 144-146
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Production Reaction Cross Section for $\text{}^{137}Cs$ Used in Radiotherapy
    Autorzy:
    Karpuz, N.
    Boz, M.
    Mavi, B.
    Oner, F.
    Akkurt, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402395.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.20.Pm
    52.59.-f
    Opis:
    During the production of the radiation source that used in radiotherapy may occur nuclear reactions are very important in terms of human health. $\text{}^{137}Cs$ is used in radiotherapy that consists of fission the $\text{}^{235}U$ core. Because of physical half-live of $\text{}^{137}Cs$ is 30 years, it is advantage for the radioactive half-lives. In this study, radionuclide production reaction cross section for $\text{}^{235}U$ $(n,f)^{137}Cs$ is calculated with TALYS 1.6 nuclear simulation code that based on Monte Carlo.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-363-B-364
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radiation Shielding Properties of Some Composite Panel
    Autorzy:
    Al-Sarray, E.
    Akkurt, İ.
    Günoğlu, K.
    Evcin, A.
    Bezir, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031289.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    radiation protection
    composite material
    radiation measurement
    Opis:
    With the discovering atomic nucleus, nuclear science started to be used in different fields and researcher focused on radiation protection as it is dangerous for human cell. Thus radiation physics and materials development becomes one of the important subject in science for this purposes. The developed material should be used for radiation shielding. In this work gamma ray shielding properties of some composite materials produced by polymer have been investigated.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 490-492
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Barite Effect on Radiation Shielding Properties of Cotton-Polyester Fabric
    Autorzy:
    Akkurt, İ.
    Emikönel, S.
    Akarslan, F.
    Günoğlu, K.
    Kilinçarslan, Ş.
    Üncü, İ.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402530.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.82.Cr
    81.05.-t
    Opis:
    Since creation of universe there has been radiation around us and this rate is getting higher with the development of technology. Thus radiation shielding becomes important subject for researcher. Besides normal people especially radiation workers in nuclear facilities need extra protection from radiation. This is vital if we think about any kind of nuclear leakage or nuclear attack, fabric becomes very important. For this purpose, cotton-polyester type of fabric has been coated by barite and gamma ray attenuation efficient has been obtained. The fabric was coated in different rate of barite (0%, 40%, 50% and 60%) in order to test effect of barite rate on the fabric. The measurement has been performed for gamma ray energy of 511, 662, and 835 keV using gamma spectrometer system with NaI(Tl) detector. It was found that the attenuation coefficient has increased with the barite coating rate on fabric.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-53-B-54
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Production of Barite and Boroncarbide Doped Radiation Shielding Polymer Composite Panels
    Autorzy:
    Evcin, O.
    Evcin, A.
    Bezir, N.
    Akkurt, İ.
    Günoğlu, K.
    Ersoy, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031261.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.Gi
    94.10.Gb
    28.41.Te
    78.66.Sq
    29.30.Kv
    Opis:
    Developments in nuclear technology in the last century have lead to the use of radiation in different areas of human activity. These are not just the energetics but also food, agriculture, medicine, industry and science. Thus, radiation has become an inevitable phenomenon in our lives. Since we cannot isolate radiation from our life, the radiation protection methods should be available. As alternatives to conventional radiation prevention methods, such as lead and heavy concrete shielding, more functional materials need to become the focus of research. The development of the least harmful to the environment, easily applicable, flexible radiation shields has become very important. In this study, silicon matrix composite panels, doped with different ratios of barite and boron carbide, were produced and characterized by optical and scanning electron microscopy (SEM). Gamma and neutron radiation shielding properties of these materials were investigated. The results have been compared with the lead as the standard shielding material.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1145-1148
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Radiation Shielding Properties of Fabrics using Image Processing Method
    Autorzy:
    Kilinçarslan, Ş.
    Üncü, İ.
    Akkurt, İ.
    Günoğlu, K.
    Akarslan, F.
    Coşkunsu, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031660.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    28.41.Te
    07.05.Pj
    Opis:
    It is extremely important to protect the human body from radioactive rays. Protective clothing can be used to absorb radiation because it is preferable to avoid the natural and artificial radiation exposure in our daily lives. There are many different types of fabric, used for clothes. In this study radiation absorbing properties of fabrics, which are widely used in the daily life, such as alpaca-type fabric, cotton fabric, cotton polyester blend fabric, woven dyed fabric and knitted fabric were examined using the image processing method.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 1171-1172
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Some Heavyweight Aggregate Half Value Layer Thickness Used for Radiation Shielding
    Autorzy:
    Akkurt, İ.
    Başyiğit, C.
    Akkaş, A.
    Kılınçarslan, Ş.
    Mavi, B.
    Günoğlu, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490934.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.Ci
    Opis:
    A radiation dose above the maximum permissible limit is very dangerous for human being. In radiation shielding, absorbent materials' properties must be well known. Heavyweight concrete is the most widely used in the world for this aim. The aggregate component of concrete plays an important role in improving concrete properties and this is effect of shielding properties of concrete. The thickness of any given material where 50% of the incident energy has been attenuated is known as the half-value layer. The half-value layer is expressed in units of distance (mm or cm). Like the attenuation coefficient, it is photon energy dependent. Increase of the penetrating energy of a stream of photons will result in an increase in a material's half-value layer. In this study, half-value layer thickness of concrete containing limonite, siderite and barite at different ratios was investigated; for this purpose measurements have been obtained by a collimated beam of gamma ray from sources $\text{}^{60}Co$. The total linear attenuation coefficient (μ), half-value layer thickness is evaluated in this study.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1; 138-140
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution of Natural Radioactivity from $\text{}^{40}K$ Radioelement in Volcanics of Sandıklı-Şuhut (Afyon) Area
    Autorzy:
    Uyanik, N.
    Öncü, Z.
    Uyanik, O.
    Bozcu, M.
    Akkurt, İ.
    Günoğlu, K.
    Yağmurlu, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402499.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    93.85.-q
    29.30.-h
    Opis:
    Many radioactive elements have existed when the Earth had appeared and the long living of them are still present. One of the most important of these radioactive elements is $\text{}^{40}K$. It makes about 0.012% of total content of K, widely represented in many different rocks. In this study the distribution of the natural $\text{}^{40}K$ radioelement in the volcanics of the south part of Afyon was investigated. Gamma-ray spectrometer was used for in-situ measurements of this radioelement concentration. Studied area has covered approximately 1800 km². In-situ measurements were performed at 1390 different locations in this field. Data for each measurement was gathered during 3 min. The map of the ^{40}K element distribution in the studied area was produced. The high values of $\text{}^{40}K$, according to this map, were obtained in the areas of the alteration zones, between Sandıklı and Şuhut in the studied area.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2B; B-438-B-440
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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