核衰变γ射线谱的测量

Gamma spectrum measurement fellowing the nuclear decay

本文对我们实验室的探测系统和数据获取方法作了介绍,这两个系统即低本底反康普顿谱仪和γ-γ-t三参数快慢符合谱仪,我们核衰变谱学组常用这两套谱仪来测量伴随核衰变的γ射线。此外作为例子用这两套谱仪对Cf自发裂变碎片衰变γ射线和伴随As的β++EC衰变γ射线的测量作了简要描述。

In this paper, the detection systems and the data acquisition methods used in the nuclear decay study in our laboratory are introduced. These two detection systems include the low-background Compton-suppressed spectrometer and the three-parameter （γ-γ-t） coincidence system of HPGe-HPGe detectors, both of which are used to measure the γ rays following the nuclear decay. In addition, as examples, the detection of γ rays following the decay of 252^Cf spontaneous fission fragments and the β^＋＋EC decay of 74^As, by using these two spectrometers, is briefly described.