PTB~(90)Sr-~(90)Yβ标准源辐射场能谱和角分布的蒙特卡罗计算

THE MONTE CARLO CALCULATION OF THE ENERGY SPECTRA AND ANGULAR DISTRIBUTION IN THE RADIATION FIELD CAUSED BY PTB ~(90)Sr-~(90)Y β STANDARD SOURCE

摘要: <正> 一、引言目前在国际上众多的β次级标准装置中,西德PTB的产品已得到广泛的应用。该装置给出四个已知活度的标准β源及几个刻度位置上的空气中吸收剂量率。β粒子是带电粒子,它与介质原子的长程电磁相互作用决定了它们在介质中的散射和吸收要比中子和光子严重得多,而β衰变的能量又是连续的,所以经过源活性区外银层和防腐蚀密封层的屏蔽

Abstract: The paper describes the Monte Carlo simulation of the electron transport onthe VAX-11/785 computer, it gives the energy spectra and the angular distributionin the radiation field caused by the PTB ~(90)Sr-~(90)Y β standard source. Thecalculated absorbed dose rates in air at given points are in agreement with experi-mental values.