Precise determination of the Cd 113 fourth-forbidden non-unique β -decay Q value

N. D. Gamage, G. Bollen, M. Eibach, K. Gulyuz, C. Izzo, R. M.E.B. Kandegedara, M. Redshaw, R. Ringle, R. Sandler, A. A. Valverde

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Using Penning trap mass spectrometry, we have performed a precise determination of the Q value for the highly forbidden β decay of Cd113. An independent measurement of the Q value fixes the end-point energy in a fit to the Cd113β-decay spectrum. This provides a strong test of systematics for detectors that have observed this decay, such as those developed for ββ-decay searches in cadmium and other isotopes. It will also aid in the theoretical description of the β-decay spectrum. The result, Qβ=323.89(27)keV, agrees at the 1.3σ level with the value obtained from the 2012 Atomic Mass Evaluation [Chin. Phys. C 36, 1603 (2012)1674-113710.1088/1674-1137/36/12/003], but is a factor of almost four more precise. We also report improved values for the atomic masses of Cd113,In113, and Cd112.

Original languageEnglish
Article number025505
JournalPhysical Review C
Issue number2
StatePublished - Aug 23 2016


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