Double-beta-decay Q values of Se-74 and Ge-76
Mar, 2010
4 pages
Published in:
- Phys.Rev.C 81 (2010) 032501
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Abstract: (APS)
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.- 21.10.Dr
- 14.60.Pq
- 07.75.+h
- 23.40.-s
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