中国物理B ›› 2005, Vol. 14 ›› Issue (1): 95-101.doi: 10.1088/1009-1963/14/1/018

• NUCLEAR PHYSICS • 上一篇    下一篇

New levels and transitions in 72Ge following the decay of 72Ga

李燕, 沈水法, 石双惠, 顾嘉辉, 刘静怡, 徐慧   

  1. Shanghai Institute of Applied Physics, The Chinese Academy of Sciences, Shanghai, 201800, China
  • 收稿日期:2004-03-11 修回日期:2004-05-18 出版日期:2005-01-20 发布日期:2005-01-20
  • 基金资助:
    Project supported by theMajor State Basic Research Development Programme of China (Grant No TG2000077404), and the National Natural Science Foundation of China (Grant No 10405031

New levels and transitions in 72Ge following the decay of 72Ga

Li Yan (李燕), Shen Shui-Fa (沈水法), Shi Shuang-Hui (石双惠), Gu Jia-Hui (顾嘉辉), Liu Jing-Yi (刘静怡), Xu Hui (徐慧)   

  1. Shanghai Institute of Applied Physics, The Chinese Academy of Sciences, Shanghai, 201800, China
  • Received:2004-03-11 Revised:2004-05-18 Online:2005-01-20 Published:2005-01-20
  • Supported by:
    Project supported by theMajor State Basic Research Development Programme of China (Grant No TG2000077404), and the National Natural Science Foundation of China (Grant No 10405031

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摘要： The decay of $^{72}$Ga has been investigated by means of $\gamma $-ray spectroscopy. The $^{72}$Ga nuclei were produced through the $^{71}$Ga(n, $\gamma)^{72}$Ga reaction. The Compton-suppressed spectrometer and high-purity Ge detectors have been used singly and in coincidence, separately, to study $\gamma$-rays in the $\beta ^{-}$ decay of $^{72}$Ga to $^{72}$Ge. Ninety-three events of $\gamma$-rays were reported, of which 7 were observed for the first time. A decay scheme of $^{72}$Ga including 4 new levels is proposed which accommodates 87 of these transitions. Spins and parities for new levels are proposed from calculated log$ft$ values, modes on the observed decay, and some nuclear reaction experimental results.

Abstract: The decay of $^{72}$Ga has been investigated by means of $\gamma $-ray spectroscopy. The $^{72}$Ga nuclei were produced through the $^{71}$Ga(n, $\gamma)^{72}$Ga reaction. The Compton-suppressed spectrometer and high-purity Ge detectors have been used singly and in coincidence, separately, to study $\gamma$-rays in the $\beta ^{-}$ decay of $^{72}$Ga to $^{72}$Ge. Ninety-three events of $\gamma$-rays were reported, of which 7 were observed for the first time. A decay scheme of $^{72}$Ga including 4 new levels is proposed which accommodates 87 of these transitions. Spins and parities for new levels are proposed from calculated log$ft$ values, modes on the observed decay, and some nuclear reaction experimental results.

Key words: decay, gamma-ray, level, coincidence

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  • 2320L