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Wyszukujesz frazę "bremsstrahlung" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Development of the technique embedded into a Monte Carlo transport system for calculation of photonuclear isotope yield
Autorzy:
Nikiforov, V. I.
Uvarov, V. L.
Powiązania:
https://bibliotekanauki.pl/articles/147914.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
electron accelerator
bremsstrahlung
photonuclear reaction
Monte Carlo (MC) simulation
isotope yield
Opis:
The paper describes two methods that use Monte Carlo transport code for computing the photonuclear isotope yield for arbitrary target activation conditions. One of them is based on a direct simulation of new nuclei generation events (DSE method). The other one involves a step-by-step calculation of isotope microyield along the photon trajectories (SBSM method). The techniques have been realized in the computer codes using the PENELOPE package of 2001, 2006 and 2008 versions. The program benchmarking was performed using experimental data on the activity distributions of 67Cu isotope produced in the 68Zn(gamma,p)67Cu reaction in thick zinc targets. Both approaches have shown to give similar results at an appreciably greater speed of the SBSM method. The results of simulation based on the PENELOPE 2006 and 2008 codes are in excellent agreement with all experimental data. At the same time, the PENELOPE 2001 computations give good agreement with the experimental results for target activation by the electron beam, but in the case of target exposed to bremsstrahlung systematic underestimation of about 15% has been observed.
Źródło:
Nukleonika; 2012, 57, 1; 75-80
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mass throughput rate calculation for X-ray facilities
Autorzy:
Ziaie, F.
Tahami, S.
Powiązania:
https://bibliotekanauki.pl/articles/148864.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
bremsstrahlung
dose uniformity
radiation processing
dynamic mode
mass throughput rate
conversion
Opis:
Abstract In this work, the mass throughput rate in a radiation processing center, equipped with an X-ray facility, is calculated by means of a curve against the thickness of the material, along with the variation of dose uniformity. Therefore, depending on the desired dose value, the best thickness and the mass throughput rate can be calculated. The calculation results for the 5 and 10 MeV X-ray bremsstrahlung for polyethylene and wood as the irradiation products, have been obtained by using a Monte-Carlo computer code. In addition, the experimental results at the same geometry and materials were compared with those calculated.
Źródło:
Nukleonika; 2005, 50, 3; 121-124
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of diagnostic tools for Plasma Focus derived X-ray source
Autorzy:
Angeli, E.
Bonifazzi, C.
Da Re, A.
Marziani, M.
Tartari, A.
Frignani, M.
Mannucci, S.
Mostacci, D.
Rocchi, F.
Sumini, M.
Powiązania:
https://bibliotekanauki.pl/articles/147434.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
plasma focus
electron impact ionization
characteristic X-ray lines
bremsstrahlung
material heating
dosimetry
Opis:
The energy spectra of X-rays generated by the impact of electron beams on high- and medium-Z targets following the pinch implosion of Plasma Focus (PF) devices are discussed in terms of the possible mechanisms of X-ray production following electron impact ionization. In addition, the temperature measurement of the PF inner electrode is reported and some results have been proved useful in order to optimize the device functionalities.
Źródło:
Nukleonika; 2006, 51, 1; 15-20
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and theoretical investigations of crater formation in an aluminium target in a PALS experiment
Autorzy:
Borodziuk, S.
Doskach, I.
Gus'kov, S.
Jungwirth, K.
Kálal, M.
Kasperczuk, A.
Kralikova, B.
Krousky, E.
Limpouch, J.
Masek, K.
Pfeifer, M.
Pisarczyk, P.
Pisarczyk, T.
Rohlena, K.
Rozanov, V.
Skala, J.
Ullschmied, J.
Powiązania:
https://bibliotekanauki.pl/articles/147967.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
laser-produced plasma
crater
absorption of laser radiation
resonance mechanism
inverse bremsstrahlung
interferometry
fast electrons
Opis:
Experimental and theoretical results of investigations of the iodine laser - Al solid target interactions on the PALS (Prague Asterix Laser System) facility are presented. The experimental investigations of laser interaction with massive Al targets devoted to shock wave propagation in solids and crater formation physics are presented. Experiments were performed with the use of high intensity laser pulses (1013 15 W/cm2) for two laser wavelengths (0.438 mi m and 1.315 mi m) and four laser beam radii (from 35 mi m up to 600 ěm). The crater dimensions were measured using optical microscopy and a wax-replica technique. Plasma expansion out of the target was measured via three-frame interferometry. Theoretical model of the postpulse crater formation by the shock wave propagating and decaying in solids after the end of the laser pulse is presented and applied for the explanation of the results obtained in experiments.
Źródło:
Nukleonika; 2004, 49, 1; 7-14
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A method for the determination of spatial electron density distribution in great Plasma-Focus devices
Autorzy:
Kasperczuk, A.
Paduch, M.
Pisarczyk, T.
Tomaszewski, K.
Powiązania:
https://bibliotekanauki.pl/articles/147148.pdf
Data publikacji:
2002
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
bremsstrahlung radiation
electron density distribution
frame optical camera
plasma-focus device
plasma radiation intensity
shadowgraphy
Opis:
Determination of the electron density of plasma generated in a great plasma-focus device by means of interferometry is very difficult or sometimes impossible. In order to determine spatial electron density distributions of plasma in a PF-1000 device, a special method was prepared, with the use of plasma images obtained by means of both an optical frame camera and shadowgraphy. Analysis of plasma radiation in the very narrow Äë = 60 Ĺ optical range allowed us to determine the relation between intensity of the plasma radiation and the electron density. It was also shown that the influence of electron temperature on plasma radiation is not large. The presented method allowed us to obtain spatial electron density distributions of plasma (in relative units) in the PF-1000 device. By means of this method a number of important information about the plasma-focus phenomenon was obtained.
Źródło:
Nukleonika; 2002, 47, 1; 23-26
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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