摘要
本文对体源自吸收进行了研究,给出了3个计算公式,其中之一是专为用实验确定修正因子而建立的,它不依赖质量减弱系数,适用于任何能量的γ射线。文中还介绍了一种测量体源质量减弱系数(μ/ρ)的方法,并给出1L凹形杯体源的平均有效光子行程长度l的实验结果。
A study has been made of the self-absorption correction for the volume source and three calculation formulas are given.One of them has been established specially for an experimental determination of this correction factor,and it is suitable to the γ-rays of any energy without depending on the mass attenuation coefficient.The paper also describes a measuring method of mass attenuation coefficient,and gives an experimental result of a mean effective photon path length within one-litre-volume source of a concave-cup form.
出处
《计量学报》
CSCD
1991年第1期64-71,共8页
Acta Metrologica Sinica
