将HI-13北京串列加速器次级束流线产生的放射性核素7Be分别注入到天然Pt和Al中,利用两个高纯锗探测器同时测量7Be经由7Li第一激发态衰变后跃迁到基态产生的478keVγ射线产额随时间的变化,结果在实验误差范围内(<0.14%)没有发现7Be衰变率在Pt与Al中有明显差别,讨论了这两种材料的电子亲和势及有效电子密度与EC衰变率的关系。 The radioactive nuclides 7Be generated from the secondary beamline of the HI-13 Beijing Tandem Accelerator were injected into natural Pt and Al, respectively. Simultaneously, 7Be was detected by two high-purity germanium detectors and then decayed through the first excited state of 7Li to the ground state The results showed that the rate of 7Be decay was not significantly different between Pt and Al within the range of experimental error (<0.14%). The electronic affinities of these two materials and the number of available electrons Relationship between density and EC decay rate.