摘要
用低本底反康谱仪（HpGe-NaI）和HpGe-HpGe的三参数符合γ－γ－T系统，对72Ga的衰变γ单谱、符合谱进行了研究，实验共获得2．3×107个符合事件．根据实验结果建立了含有26个能级、87条γ射线的72Ga的衰变能级纲图，其中包含首次测到7条γ射线225．92、826．97、1349.71、1475．32、1667．91、2105．28、2247．39keV和4个能级3248．01、3396．27、3806．10、3864．56keVS并为2939．83keV能级和112．59、937．97、2402．25、2939．95keV4条γ射线的存在提供了证据；实验没有发现113．5、1155．7、1192．4keVγ射线和能级3307．1keV存在的证据。并把317．72keVγ射线的跃迁，由原来的能级3757．26keV跃迁到3439．51keV能级，改为3565．85keV到3248．01keV能级跃迁．
The radioactive decay of 72Ga has been investigated by means of NaI-HpGe Compton-suppress spectrometer,and γ-γ coincidence measurements Performed with two HpGe detectors coupled to three-parameter(γ-γ-T) data acquisition system. 2.3×10 7 coincidence events are collected. A new decay scheme of 72Ga including 26 levels,87 γ-rays is established. The extensive coincidence relationships are used to identify the γrays and levels of 72 Ge, such as new γ-rays of 225. 92, 826.97, 1349.71,1475. 32, 1667.91, 2105.28, 2247.39keV and new levels of 3248.01, 3396.27, 3806.10,3864.56keV. The unsure transitions of 112.59, 937.97, 2402.25, 2939.95keV and level of 2939.83keV are confirmed in thes work. No evidence has been observed for the existences of 113.5, 1155.7, 1192.4keV γ-rays and level of 3707.1keV. The transitiou of 317.72keV γ-ray is moved from 3757.26-3439. 51keV level to 3565.85-3248.01keV level. Received 12 March 1998 *Supported by the Nation Natural Science Foundation of China (19635030) and the Chinese Academy of Sciences (KJ952-S1-420)
出处
《高能物理与核物理》
CSCD
北大核心
1999年第4期320-327,共8页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金!19635030
中国科学院支持项目!KJ952-S1-420
