计量学报2016，Vol.37Issue(z1)：15-19,5.DOI:10.3969/j.issn.1000-1158.2016.z1.04
X射线石墨空腔电离室壁修正因子的蒙特卡罗模拟
X-rays Graphite Cavity Ionization Chamber Wall Correction Factor Monte Carlo Simulation
摘要
Abstract
The wall correction factor of three kinds of graphite cavity ionization chamber in 250 ～ 600 kV X-rays wide spectrum radiation quality is simulated by using EGSnrc Monte Carlo program.According to the radiation quality and X-rays tube parameters,8 standard X-rays spectrum are simulated by BEAMnrc program package.The phase space files that simulated by BEAMnrc is used as X-rays source of user code cavity,then the phase space files is used to calculate correction factors of graphite cavity ionization chamber.The simulation results show that the spherical ionization chamber of the same volume,the longer collector electrode is with larger wall correction factor;for the same length of collector electrode,the wall correction factor of the sphere-cylindrical ionization chamber is larger than the spherical ionization chamber.And when the X-rays energy is increased,the wall correction factor of the ionization chamber is tend to decrease.关键词
计量学/X射线/石墨空腔电离室/壁修正因子/蒙特卡罗模拟/EGSnrcKey words
metrology/X-rays/graphite cavity ionization chamber/wall correction factor/Monte Carlo simulation/EGSnrc分类
通用工业技术引用本文复制引用
余继利,方方,吴金杰,李婷..X射线石墨空腔电离室壁修正因子的蒙特卡罗模拟[J].计量学报,2016,37(z1):15-19,5.基金项目
国家自然科学基金(11475036,41404108) （11475036,41404108）
