摘要
本文利用CoMo170表面污染监测仪对90Sr-90Y平面源进行测量,研究吸收效应、γ射线干扰等因素对于β表面活度响应值的影响规律。结果发现遮挡塑料布对于β粒子的吸收衰减很显著,而且塑料布越厚,衰减越明显;γ射线的干扰也会对结果造成影响,铝板和有机玻璃板的组合能够有效屏蔽β射线。因此,在β表面污染的实际测量中,须严格按照规定操作测量,针对相关测量因素应引起足够的重视。
This paper uses CoMo170 surface contamination monitor to measure the90 Sr-90 Y plane source,and studies absorption effect and gamma rays interference on the surface activity response.It was found that the absorption attenuation of beta particles by the shielding plastic cloth is significant,and the thicker the plastic cloth is,the more obvious the attenuation is;The interference of gamma rays also has influence on the results,and the combination of aluminum plate and organic glass plate can effectively shield beta rays.Therefore,in the actual measurement of beta surface contamination,the measurement must be carried out in strict accordance with the regulations.
作者
李玉芹
文章
LI Yu-qin;WEN Zhang(China Institute of Atomic Energy,Beijing 102413,China)
出处
《科技视界》
2019年第10期88-88,92,共2页
Science & Technology Vision
关键词
表面污染
测量因素影响
表面活度响应
Beta surface contamination
Measurement factors impact
Surface activity response
