摘要
本文主要介绍用“电离法测量６０Ｃｏγ射线石墨吸收剂量基准装置”和Ｌｏｅｖｉｎｇｅｒ提出的“比例定度原理”测量水中吸收剂量的方法和结果。所得水中吸收剂量的合成不确定度为０．６９％，长期稳定性好于０．５％。该方法与其它３种方法比对测量水中相同点的吸收剂量值在±０．５８％以内吻合。该方法也可用于其它物质（如有机玻璃。
This paper describes a method of obtaining absorbed dose to water from a graphite ionization chamber as a national absorbed dose primary standard by using the Loevinger′s photon fluence scaling theorem.The experimental results show that estimated combined uncertainty of measuring absorbed dose to water is 0 69% and the lung term stability is 0 5%.The intercomparson study was conducted between this method and others three absolute methods at the same measurement point,the values of the absorbed dose rates was in agreement within 0 58%.The method can also be useed to determine the doses of other materials,such as PMMA or Polystyrene. (
出处
《辐射防护》
CAS
CSCD
北大核心
1996年第5期354-363,共10页
Radiation Protection
基金
国家自然科学基金
