Observation of Beta-Delayed Proton Decay of 69Kr

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Xu Xiaoji, Huang Wenxue, Ma Ruichang, Gu Zhongdao, Yang Yongfeng, Wang Yanyu and Dong Chengfu. Observation of Beta-Delayed Proton Decay of 69Kr[J]. Chinese Physics C, 1997, 21(3): 286-288.
Xu Xiaoji, Huang Wenxue, Ma Ruichang, Gu Zhongdao, Yang Yongfeng, Wang Yanyu and Dong Chengfu. Observation of Beta-Delayed Proton Decay of 69Kr[J]. Chinese Physics C, 1997, 21(3): 286-288. shu
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Revised: 1900-01-01
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Observation of Beta-Delayed Proton Decay of 69Kr

    Corresponding author: Xu Xiaoji,
  • Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000

Abstract: A new group of protons at a laboratory energy of (4.07±0.05) MeV with half-life of (32±10)ms was discovered via observing the decay proton spectrum resulting from 32S+Ca reaction.By reaction channel analyses and comparing with theoretical prediction,this new proton radioactivity was assigned to arising from the beta-delayed proton decay of 69Kr produced in the 40Ca(32S,3n) reaction,corresponding to decay of the T=3/2 isobaric analog state in 69Br to the ground state of 68Se.Combining this measurement with Coulomb displacement energy calculation yields a mass excess for 69Kr of (-32.15±0.30)MeV. The partial decay scheme of 69Kr was proposed.

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