Phys. Rev. Lett. 95, 022501 (2005) [4 pages]Observation of Proton Radioactivity of the (21+) High-Spin Isomer in 94AgReceived 29 March 2005; published 5 July 2005 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 γ-γ correlations and applying γ 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.022501
DOI:
10.1103/PhysRevLett.95.022501
PACS:
23.50.+z, 21.10.−k, 21.60.Cs, 27.60.+j
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