摘要
简述了４πβ（Ｌ－Ｓ） γ符合法绝对测量２２Ｎａ 溶液比活度的原理， 导出了精确的符合计数方程，估计了β控测器对γ射线的效率及其对结果的影响。测量结果的扩展不确定度（ ｋ ＝ ３） ＜ １－４ ％ 。与其它二种装置比较， 结果在０－６３ ％ 以内符合。
The paper describes the principle for absolute measurement of specific activity of 22 Na solution with 4πβ(L S) γcoincidence method The coincidence counting equation are strictly derived The γray efficiency of βdetector and its effect on measuring results are estimated Expanded uncertainty ( k =3) of measured result is less than 1 4% The result comparing with measuring results by other two sets of equipment,they are agreeable within 0 63%
出处
《核动力工程》
EI
CAS
CSCD
北大核心
1999年第5期456-458,共3页
Nuclear Power Engineering
