β辐射剂量转换因子 H'(0.07)/D_a 的蒙特卡罗计算

MONTE CARLO CALCULATION OF THE CONVENSION FACTOR H′(0.07)/Da IN β RADIATION FIELD

本文从 ICRU39号报告关于定向剂量当量的定义出发,编制了计算^(90)Sr-^(90)Y 源β辐射场中某一点处的定向剂量当量 H′(0.07)与该点处无受体时空气吸收剂量 D_a 间的转换因子的蒙卡程序。在 VAX-Ⅱ/785型计算机上运行该程序,给出了该转换因子的理论计算值。计算值与联邦德国技术物理研究院(PTB)所给的实验值基本相符。

This article deals with the Monte Carlo calculation of theconvension factor H'(0.07)/D_a in β radiation field on VAX-Ⅱ/785computer,where H'(0.07)is directional dose equivalent defined inICRU Report 39,D_a is the absorbed dose in air.The theoretical calcul-ation value of this convension factor is given,which is in agreementwith the experimental Value given by PTB's authors of FRG.