Chinese Physics C > 1997, Vol. 21 > Issue(3): 286-288

Observation of Beta-Delayed Proton Decay of⁶⁹Kr

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000

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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.

References

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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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Received: 1900-01-01
Revised: 1900-01-01

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Observation of Beta-Delayed Proton Decay of⁶⁹Kr

Corresponding author:Xu Xiaoji,

Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000

Received Date:1900-01-01
Accepted Date:1900-01-01
Available Online:1997-03-05

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 from³²S+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 of⁶⁹Kr produced in the⁴⁰Ca(³²S,3n) reaction,corresponding to decay of the T=3/2 isobaric analog state in⁶⁹Br to the ground state of⁶⁸Se.Combining this measurement with Coulomb displacement energy calculation yields a mass excess for⁶⁹Kr of (－32.15±0.30)MeV. The partial decay scheme of⁶⁹Kr was proposed.