摘要
放射性核素４０Ｋ是我们已经研制成的ＨＰＧｅ低本底反符合γ谱仪本底的主要来源。本文介绍确定４０Ｋ来源的方法及其结果。结果表明，４０Ｋ本底主要来自由北京核仪器厂生产的ＳＴ１０５型ＮａＩ（Ｔｌ）环探测器所使用的６个光导玻璃窗，其钾含量为１５．８％，所含４０Ｋ总的放射性活度约为９１０Ｂｑ。
The gamma ray from 40 K is the main source of the background in our HPGe low background anti coincidence γ spectrometer. The method for finding the origin of existing 40 K and its measuring results are described. The experimental results show that the 40 K background is mainly from the six light guide glass windows on ST105 annular NaI(Tl) detector. The Potassium content in the glass window amounts to 15.8% and the activity of 40 K in all glass windows is about 910 Bq. (
出处
《辐射防护》
CAS
CSCD
北大核心
1999年第4期301-305,共5页
Radiation Protection
关键词
低本底
反符合
Γ谱仪
钾40
HPGE
探测器
Low Background, Anti coincidence γ spectrometer, 40 K Background, Annular NaI(Tl) Detector, Light Guide Glass Window)
