Observation of proton radioactivity of the (21+) high-spin isomer in 94Ag.
We have observed direct one-proton decay of the (21+) isomer in the N=Z nuclide 94Ag into high-spin states in 93Pd by detecting protons in coincidence with gamma-gamma correlations and applying gamma gates based on known 93Pd levels. Two decay branches have been identified, with proton energies of 0.79(3) and 1.01(3) MeV and branching ratios of 1.9(5)% and 2.2(4)%, respectively. The corresponding partial half-life values are 21(6) and 18(4) s. The Q value of the direct proton decay of the (21+) isomer was found to be 5.78(3) MeV. The very small reduced widths of the observed proton decays might reflect dominating collective configurations in the (21+) isomer, and the fine structure of the proton spectrum might indicate a strong deformation of this state.
Mukha
I
I
Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium. Ivan.mukha@fys.kuleuven.ac.be
Roeckl
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Döring
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Batist
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Blazhev
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Grawe
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Hoffman
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Huyse
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Janas
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Kirchner
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La Commara
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Mazzocchi
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Plettner
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Tabor
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Van Duppen
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Wiedeking
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