Double-β-decay Q values of Se74 and Ge76

Brianna J. Mount, Matthew Redshaw, Edmund G. Myers

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The atomic masses of Ge74, Se74, Ge76, and Se76 have been determined from cyclotron frequency ratios of pairs of ions simultaneously trapped in a cryogenic Penning trap. Allowing for cancellation of systematic errors in the mass differences between isobars, we determine the Q value for double-electron capture of Se74 to be 1209.240(7) keV, and the Q value for double-electron emission of Ge76 to be 2039.061(7) keV. The new Q2EC value for Se74 precludes a large resonant enhancement for neutrinoless double-electron capture.

Original languageEnglish
Article number032501
JournalPhysical Review C - Nuclear Physics
Issue number3
StatePublished - Mar 23 2010


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