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    Wyświetlanie 1-7 z 7
    Tytuł:
    Investigation of corpuscular emission from the Prague Capillary Pinch
    Autorzy:
    Skladnik-Sadowska, E.
    Baranowski, J.
    Sadowski, M.
    Kolácek, K.
    Ripa, M.
    Ctibor, P.
    Kishinets, A.
    Rupasov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147142.pdf
    Data publikacji:
    2002
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    capillary pinch
    corpuscular flux
    track detectors
    X-radiation
    Opis:
    The paper presents results of preliminary measurements of the corpuscular radiation from fast z-pinch discharges, which were performed at the Prague Capillary Pinch facility within a frame of the Czech-Polish scientific collaboration programme. Time-integrated measurements were performed by means of a pinhole camera, equipped with nuclear track detectors of the CR-39 type. In order to perform time-resolved measurements the use was made of a single Faraday-type collector and a double-cup system. It was demonstrated that the fast capillary discharges can emit not only pulses of intense visible radiation and soft X-rays, but also pulses of the corpuscular radiation. An optical analysis of the particle tracks was performed. The particle flux at a distance of 20 cm from the collimator outlet was estimated to be 3.5×107 particles/cm2.
    Źródło:
    Nukleonika; 2002, 47, 1; 31-37
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of uranium concentrations in some building materials in Iraq
    Autorzy:
    Najam, L. A.
    Tawfiq, N. F.
    Yassen, Q. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/148408.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    uranium concentration
    fission tracks
    CR-39 track detectors
    building materials
    Opis:
    Eleven commonly used building construction materials were collected from several origins in Iraq and analyzed for uranium concentration using a fission track technique. The results of measurements of uranium concentration ranged between 0.22 ppm in ceramics and 1.86 ppm in marble. The obtained results were well below the allowed limit of 11.7 ppm.
    Źródło:
    Nukleonika; 2013, 58, 2; 329-331
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    D(3He,p)4He and D(d,p)3H fusion in a small plasma focus operated in a deuterium helium-3 gas mixture
    Autorzy:
    Springham, S.
    Sim, T.
    Rawat, T.
    Lee, P.
    Patran, A.
    Shutler, P.
    Tan, T.
    Lee, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/147428.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    plasma focus
    deuterium
    helium-3
    fusion
    CR-39
    track detectors
    Opis:
    Abstract A 3 kJ plasma focus was operated with a 3He-D2 gas mixture, with partial pressures in the ratio of 2:1, corresponding to an atomic number ratio of 1:1 for 3He and D atoms. The fusion reactions D(3He,p)4He and D(d,p)3H were measured simultaneously using CR-39 polymer nuclear track detectors placed inside a pinhole camera positioned on the forward plasma focus axis. A sandwich arrangement of two 1000 mi m thick CR-39 detectors enabled the simultaneous registration of two groups of protons with approximate energies of 16 MeV and 3 MeV arising from the D(3He,p)4He and D(d,p)3H reactions, respectively. Radial track density distributions were obtained from each CR-39 detector and per-shot average distributions were calculated for the two groups of protons. It is found that the D(3He,p)4He and D(d,p)3H proton yields are of similar magnitude. Comparing the experimental distributions with results from a Monte Carlo simulation, it was deduced that the D(3He,p)4He fusion is concentrated close to the plasma focus pinch column, while the D(d,p)3H fusion occurs relatively far from the pinch. The relative absence of D(d,p)3H fusion in the pinch is one significant reason for concluding that the D(3He,p)4He fusion occurring in the plasma focus pinch is not thermonuclear in origin. It is argued that the bulk of the D(3He,p)4He fusion is due to energetic 3He2+ ions incident on a deuterium target. Possible explanations for differing spatial distributions of D(3He,p)4He and D(d,p)3H fusion in the plasma focus are discussed.
    Źródło:
    Nukleonika; 2006, 51, 1; 47-53
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of characteristics of pulsed ion beams emitted from different small PF devices
    Autorzy:
    Sadowski, M.
    Skladnik-Sadowska, E.
    Baranowski, J.
    Zebrowski, J.
    Kelly, H.
    Lepone, A.
    Marquez, A.
    Milanese, M.
    Moroso, R.
    Pouzo, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146809.pdf
    Data publikacji:
    2000
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    Faraday cups
    ion beams
    plasma focus
    Thomson analyzers
    track detectors
    Opis:
    The paper concerns studies of pulsed ion beams emitted from different small-energy (5–50 kJ) devices of the plasma focus (PF) type. Emission characteristics of the ion beams as measured with nuclear track detectors (NTDs), Faraday-type collectors (FC), and Thomson-type analyzers, are summarized. Common features of the ion emission are considered and some differences are discussed.
    Źródło:
    Nukleonika; 2000, 45, 3; 179-184
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lung Cancer Risk Due to Radon in Different Brand Cigarette Tobacco in Iraqi Market
    Autorzy:
    Abdalsattar, Kareem Hashim
    Ahmed Najam, Ahmed Najam
    Abbas, Fadhel Hadi
    Fadhil, Khaddam fuliful
    Powiązania:
    https://bibliotekanauki.pl/articles/1178355.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    CR-39
    Radon
    effective dose
    lung cancer
    nuclear track detectors
    tobacco
    Opis:
    Sealed can technique using CR-39 plastic track detector strippable has been used in order to measure radon concentrations to calculate the annual effective dose and lung cancer cases per year per million person for twenty different brand tobacco cigarette were collected from Iraqi market. Lung cancer is the leading cause of cancer-related deaths worldwide. Radon exposure is the second leading cause of lung cancer, following tobacco smoke. Radon is not only an independent risk factor; it also increases the risk of lung cancer in smokers. It has been observed that tobacco smoking increases the risks of radon-induced lung cancer. Radon and cigarette smoking have synergistic, multiplicative effect on lung cancer rates. People who inhale tobacco smoke are exposed to higher concentrations of radioactivity. Ever since studies on the relation of smoking to cancer, particularly the lung cancer has been established, there had been a great interest in studies concerned with the monitoring of the alpha radioactivity in tobacco. The results showed that the 222Rn concentrations in cigarette tobacco samples ranged from (156.450 to 403.087) Bq/m3 with an average 284.751 Bq/m3, while the radon induced lung cancer risks was found to vary from 71.047 to 183.049 with an av¬erage value of 129.3107 per million person, and standard deviation 83.529 and 37.932, respectively. Excellent correlation has been observed between radon concentration and lung cancer cases per year per million person for different brand tobacco cigarettes.
    Źródło:
    World Scientific News; 2017, 77, 2; 163-176
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Background outdoor radon levels in Slovenia
    Autorzy:
    Vaupotič, J.
    Kobal, I.
    Križman, M. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/148834.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radon
    outdoor air
    solid-state nuclear track detectors (SSNTD)
    outdoor radon map
    Opis:
    Radon (222Rn) activity concentration in outdoor air was measured by exposing track etch detectors at 60 points. Values were found in the range of 3.7–41.0 Bqźm–3, with a geometric mean (GM) of 11.8 Bqźm–3 and geometric standard deviation (GSD) of 2.2. An outdoor radon map of Slovenia was drawn, showing the majority of elevated values to be in the south-west part of the country that is covered by carbonates.
    Źródło:
    Nukleonika; 2010, 55, 4; 579-582
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charged projectile spectrometry using solid-state nuclear track detector of the PM-355 type
    Autorzy:
    Malinowska, A.
    Jaskóła, M.
    Korman, A.
    Szydłowski, A.
    Malinowski, K.
    Kuk, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/146945.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    solid-state nuclear track detectors (SSNTDs)
    PM-355
    energy resolution of proton and deuteron
    calibration diagrams
    track mean gray level
    Opis:
    To use effectively any radiation detector in high-temperature plasma experiments, it must have a lot of benefits and fulfill a number of requirements. The most important are: a high energy resolution, linearity over a wide range of recorded particle energy, high detection efficiency for these particles, a long lifetime and resistance to harsh conditions existing in plasma experiments and so on. Solid-state nuclear track detectors have been used in our laboratory in plasma experiments for many years, but recently we have made an attempt to use these detectors in spectroscopic measurements performed on some plasma facilities. This paper presents a method that we used to elaborate etched track diameters to evaluate the incident projectile energy magnitude. The method is based on the data obtained from a semiautomatic track scanning system that selects tracks according to two parameters, track diameter and its mean gray level.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 2; 591-596
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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