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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:
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
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:
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:
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:
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 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:
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:
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:
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:
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:
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:
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 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:
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
Wyświetlanie 1-15 z 49

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