中国物理B ›› 2005, Vol. 14 ›› Issue (3): 487-493.doi: 10.1088/1009-1963/14/3/010

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A study on the decay of 72As

李燕, 沈水法, 顾嘉辉, 石双惠, 刘静怡   

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2004-06-14 修回日期:2004-08-04 出版日期:2005-03-02 发布日期:2005-03-02
  • 基金资助:
    Project supported by the Major State Basic Research Development Programme of China (Grant No TG2000077404), the National Natural Science Foundation of China (Grant No 10405031), and the National Natural Science Foundation of China (Grant No 10475026).

A study on the decay of 72As

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

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2004-06-14 Revised:2004-08-04 Online:2005-03-02 Published:2005-03-02
  • Supported by:
    Project supported by the Major State Basic Research Development Programme of China (Grant No TG2000077404), the National Natural Science Foundation of China (Grant No 10405031), and the National Natural Science Foundation of China (Grant No 10475026).

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摘要： The excited states of the 72Ge nucleus were investigated in radioactive decay of 72As. Three new transitions with 1996.58, 2125.59 and 2255.49keV have been found for the first time. One $\gamma$-ray with 912.09keV has been placed in the decay scheme for the first time, and the placement of 1938.88, 2116.79, 2785.59, 2833.03, 2950.69 and 3338.00keV γ-rays are confirmed again in the present work. One new level at 2027.72keV excitation energy is proposed. The level scheme was established and for a number of levels spin-parity assignments are suggested on the basis of logft values and γ-branching ratios.

关键词: decay, γ-ray, level, coincidence

Abstract: The excited states of the 72Ge nucleus were investigated in radioactive decay of 72As. Three new transitions with 1996.58, 2125.59 and 2255.49keV have been found for the first time. One $\gamma$-ray with 912.09keV has been placed in the decay scheme for the first time, and the placement of 1938.88, 2116.79, 2785.59, 2833.03, 2950.69 and 3338.00keV $\gamma$-rays are confirmed again in the present work. One new level at 2027.72keV excitation energy is proposed. The level scheme was established and for a number of levels spin-parity assignments are suggested on the basis of logft values and $\gamma$-branching ratios.

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

中图分类号:  (γ-transitions and level energies)

  • 23.20.Lv
21.10.Hw (Spin, parity, and isobaric spin) 23.20.Nx (Internal conversion and extranuclear effects (including Auger electrons and internal bremsstrahlung))