MC法模拟γ射线参考辐射能量注量谱  

A Monte-Carlo Calculation of Gamma-Ray Reference Radiation Spectrum

作　　者：倪宁[1] 肖雪夫[1] 滕忠斌 宋明哲[1] 高飞[1] 张曦[1] NI Ning;XIAO Xue-fu;TENG Zhong-bin;SONG Ming-zheI;GAO Fei;ZHANG Xi(China Institution of Atomic Energy,Beijing 102413,China;East China University of Technology,Nanchang 330000,China)

机构地区：[1]中国原子能科学研究院,北京102413 [2]东华理工大学,南昌330000

出　　处：《核电子学与探测技术》2018年第3期309-313,共5页Nuclear Electronics & Detection Technology

摘　　要：使用MCNP模拟计算软件建立了多源照射装置的MC模型,开展了参考辐射能量注量谱的研究工作。结果表明,参考辐射产生条件不同,γ射线参考辐射的能量注量谱会存在差异,尤其是使用铅衰减器后会使能谱硬化平均能量增加。使用蒙卡计算得到的不同能量注量谱计算了空气与石墨质能吸收系数比和石墨与空气碰撞阻止本领比,计算结果显示两者并未随能量注量谱的变化产生明显改变。The values of photon mass energy-absorption coefficients ratios and stopping-power ratios are calculated by known photon spectrum in air kerma measurement by Bragg-Gray cavity theory based graphite cavity chambers.A study of reference radiation spectrum is carried out by the means of MonteCarlo and MCNP calculation software.The results show that the radiation spectrums vary different by different production,especially with an attenuation which can increase the mean energy of the spectrum and harden the spectrum.A detailed calculation of values of photon mass energy-absorption coefficients ratios and stopping-power ratios is carried out,the calculation results show no-significant changes of the values with the changes of radiation spectrum.

关 键 词：γ射线参考辐射 能量注量谱 MC模拟 空气比释动能 空腔理论 

分 类 号：TB98[一般工业技术—计量学] TL84[机械工程—测试计量技术及仪器]