摘要
为指导85 Kr测厚源的制备,采用两种材质、两种活性区、两种丰度的85 Kr原料气制备一批同等活度(7.4 GBq)的测厚源,采用自行研制的85 Kr源β输出电压装置对制备的测厚源输出电压进行测量。结果表明,采用钛材质、小活性区、20%丰度原料的测厚源输出电压更高。钛材质的源窗、小活性区的源壳、高丰度的原料对β射线的吸收更少,因此在制备某种活度的85 Kr测厚源时,为提高射线输出,应优先采用钛材质、小活性区、高丰度的原料。
In the ordinary way,the output performance of 85 Kr radioactive source depends on activity,85 Kr radioactive sources with equal activity have similar output performance.But the output performance of 85 Kr thickness gauge source on the market is inconsistent while the sources have the same size and activity,and this may be related to the preparation process of 85 Kr radioactive source by different suppliers.Furthermore,preparation process that shell material,active region and feed gas should be considered.85 Kr radioactive source with equal activity(7.4 GBq)were prepared by different shell material,active region and feed gas with different abundances.The output voltage of these 85 Kr radioactive sources were measured by 85 Krβoutput voltage device developed by HTA Co.,Ltd.The results show that 85 Kr radioactive source prepared by titanium shell has lager output voltage than stainless shell,85 Kr radioactive source prepared by small activity region has a little bit lager output voltage than big activity region,and output voltage of 85 Kr radioactive source prepared by more abundant feed gas is slightly lager than less abundant feed gas.This because that 85 Kr radioactive source prepared by titanium shell,small activity region and lager abundant feed gas has less absorption of beta rays than that prepared by stainless shell,big activity region and less abundant feed gas.This can guidance on of preparation for 85 Kr thickness gauge source based onβoutput efficiency.
作者
彭怡刚
梁斌斌
王子默
巴伟伟
刘超
高翔
PENG Yigang;LIANG Binbin;WANG Zimo;BA Weiwei;LIU Chao;GAO Xiang(HTA Co.,Ltd.,Beijing 102413,China)
出处
《同位素》
CAS
2021年第2期127-132,共6页
Journal of Isotopes
关键词
不锈钢
钛
原料气
活性区
输出性能
stainless steel
titanium
feed gas
active region
output performance
