光子注量到空气比释动能转换系数的Monte-Carlo模拟

Monte-Carlo Simulation of Conversion Coefficient for Air Kerma From Photon Fluence

摘要: 本文采用蒙特卡罗程序EGS5模拟计算单位注量的10 keV～10 MeV的光子在空气中所产生的空气比释动能，并将计算结果拟合成公式。模拟计算结果与ICRP74号报告中建议值的相对偏差在±2.0%以内，与ICRU47号报告中建议值的相对偏差在±3.5%以内；拟合值与前者的相对偏差在±4.0%以内，与后者的相对偏差在±7.0%范围内。

Abstract: The conversion coefficients for air kerma from photon fluence were calculated using Monte-Carlo code EGS5 with photon energy range from 10 keV to 10 MeV. The calculated results of Monte-Carlo simulation show good agreement with the data recommended by ICRP74, ICRU47 reports within ±2.0%, ±3.5%, respectively. The calculated results were fitted to a parametric formula. The values of the formula were in agreement within ±4.0%, ±7.0% compared to the data recommended by ICRP74, ICRU47 reports, respectively.