Mass Measurements and Implications for the Energy of the High-Spin Isomer in 94Ag

Abstract

Nuclides in the vicinity of 94Ag have been studied with the Penning trap mass spectrometer JYFLTRAP at the Ion-Guide Separator On-Line. The masses of the two-proton-decay daughter 92Rh and the beta-decay daughter 94Pd of the high-spin isomer in 94Ag have been measured, and the masses of 93Pd and 94Ag have been deduced. When combined with the data from the one-proton or two-proton-decay experiments, the results lead to contradictory mass excess values for the high-spin isomer in 94Ag, -46370(170) or -44970(100) keV, corresponding to excitation energies of 6960(400) or 8360(370) keV, respectively.

arXiv comment4 pages, 3 figures and 3 tables; v2: updated figures and references, published in Physical Review Letters

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• A Hot Cavity Laser Ion Source at IGISOL
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• A Novel Method for the Measurement of Half-Lives and Decay Branching Ratios of Exotic Nuclei