K荧光能谱及荧光产额MC模拟  

Monte Carlo Simulation of K Fluorescence Radiation Spectrum and Fluorescence Yield

作　　者：陈成[1,2] 吴金杰[2] 周四春[1] 陈法君[1,2] 王佳[1,3] 葛良全[1] 

机构地区：[1]成都理工大学,成都610059 [2]中国计量科学研究院,北京100013 [3]南华大学,衡阳421000

出　　处：《核电子学与探测技术》2015年第3期299-302,共4页Nuclear Electronics & Detection Technology

基　　金：质检公益性行业科研专项(201210003);中国计量科学研究院基本科研业务费(25-AKY1307)资助

摘　　要：K荧光X射线辐射装置能够开展各类核辐射探测器的校准和研究工作,基于McNP5模拟程序建立了K荧光发生装置的模型。荧光辐射束是影响探测器校准的关键,辐射体厚度决定荧光的产额。通过蒙特卡罗模拟Cs_2sO_4辐射体材料,得到辐射束各个位置的荧光出射谱、荧光产额和纯度与辐射体厚度的变化关系。结果表明,辐射束在1m处的半径大于25cm且散射成分对荧光能谱的干扰小,辐射体存在饱和厚度。该研究结果可对实验制作各种辐射体以及荧光的定性和定量分析具有参考作用。K fluorescent X ray radiation device can carry out various kinds of radiation detector calibration and research work. The fluorescence of K generator model is established based on MCNP5 simulation program. The fluorescence radiation beam is the key factor to influence detector calibration, radiator thickness decide the fluo- rescence yield. Through Monte Carlo simulation, Cs2SO4 radiator material is studied, the fluorescence radiation beam emitted spectrum at each position, the relationship between fluorescence yield and purity as a ruction of the radiator thickness are obtained. The results show that, the radiation radius of the beam at the 1 m is greater than 25 em and scattering components of interference spectrum is small, and the various radiators have a saturated thickness. The results of this study can provided a reference for the experimental production of various ra- diatom and the qualitative and quantitative analysis of fluorescence.

关 键 词：K荧光X射线 蒙特卡罗模拟计算 辐射束 辐射体厚度 

分 类 号：TL99[核科学技术—核技术及应用]