Monte Carlo simulation of prompt γ-ray spectra from depleted uranium under D-T neutron irradiation and electron recoil spectra in a liquid scintillator detector  

作　　者：秦建国 赖财锋 刘荣 朱通华 张信威 叶邦角 

机构地区：[1]Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China [2]Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, P.O.Box 213, Mianyang 621900, China [3]Graduate School, China Academy of Engineering Physics, Mianyang 621900, China [4]Institute of Applied Physics and Computational Mathematics, P.O.Box 8009, Beijing 100088, China

出　　处：《Chinese Physics C》2016年第3期115-119,共5页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation of China(91226104); National Special Magnetic Confinement Fusion Energy Research,China(2015GB108001)

摘　　要：To overcome the problem of inefficient computing time and unreliable results in MCNP5 calculation, a two-step method is adopted to calculate the energy deposition of prompt γ-rays in detectors for depleted uranium spherical shells under D-T neutron irradiation. In the first step, the γ-ray spectrum for energy below 7 MeV is calculated by MCNP5 code; secondly, the electron recoil spectrum in a BC501 A liquid scintillator detector is simulated based on EGSnrc Monte Carlo Code with the γ-ray spectrum from the first step as input. The comparison of calculated results with experimental ones shows that the simulations agree well with experiment in the energy region 0.4–3 MeV for the prompt γ-ray spectrum and below 4 MeVee for the electron recoil spectrum. The reliability of the two-step method in this work is validated.To overcome the problem of inefficient computing time and unreliable results in MCNP5 calculation, a two-step method is adopted to calculate the energy deposition of prompt γ-rays in detectors for depleted uranium spherical shells under D-T neutron irradiation. In the first step, the γ-ray spectrum for energy below 7 MeV is calculated by MCNP5 code; secondly, the electron recoil spectrum in a BC501 A liquid scintillator detector is simulated based on EGSnrc Monte Carlo Code with the γ-ray spectrum from the first step as input. The comparison of calculated results with experimental ones shows that the simulations agree well with experiment in the energy region 0.4–3 MeV for the prompt γ-ray spectrum and below 4 MeVee for the electron recoil spectrum. The reliability of the two-step method in this work is validated.

关 键 词：Monte Carlo simulation depleted uranium prompt γ-ray energy spectrum recoil electron spectrum 

分 类 号：TL812.2[核科学技术—核技术及应用]