Determination of the direct double- β -decay Q value of Zr 96 and atomic masses of Zr 90 - 92 , 94 , 96 and Mo 92 , 94 - 98 , 100

Gulyuz, K.; Ariche, J.; Bollen, G.; Bustabad, S.; Eibach, M.; Izzo, C.; Novario, S. J.; Redshaw, M.; Ringle, R.; Sandler, R.; Schwarz, S.; Valverde, A. A.

doi:10.1103/PhysRevC.91.055501

Title: Determination of the direct double- $β$ -decay $Q$ value of ${}_{96}{Zr}$ and atomic masses of ${}_{90 - 92, 94, 96}{Zr}$ and ${}_{92, 94 - 98, 100}{Mo}$

Journal Article · Wed May 06 00:00:00 EDT 2015 · Physical Review. C. Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.91.055501· OSTI ID:1179712

Gulyuz, K.; Ariche, J.; Bollen, G.; Bustabad, S.; Eibach, M.; Izzo, C.; Novario, S. J.; Redshaw, M.; Ringle, R.; Sandler, R.; Schwarz, S.; Valverde, A. A.

Experimental searches for neutrinoless double-β decay offer one of the best opportunities to look for physics beyond the standard model. Detecting this decay would confirm the Majorana nature of the neutrino, and a measurement of its half-life can be used to determine the absolute neutrino mass scale. Important to both tasks is an accurate knowledge of the Q value of the double-β decay. The LEBIT Penning trap mass spectrometer was used for the first direct experimental determination of the ⁹⁶Zr double-β decay Q value: Q_ββ=3355.85(15) keV. This value is nearly 7 keV larger than the 2012 Atomic Mass Evaluation [M. Wang et al., Chin. Phys. C 36, 1603 (2012)] value and one order of magnitude more precise. The 3-σ shift is primarily due to a more accurate measurement of the ⁹⁶Zr atomic mass: m(⁹⁶Zr)=95.90827735(17) u. Using the new Q value, the 2νββ-decay matrix element, |M_2ν|, is calculated. Improved determinations of the atomic masses of all other zirconium (^90-92,94,96Zr) and molybdenum (^92,94-98,100Mo) isotopes using both ¹²C₈ and ⁸⁷Rb as references are also reported.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: 03ER-41268

OSTI ID:: 1179712

Journal Information:: Physical Review. C. Nuclear Physics, Journal Name: Physical Review. C. Nuclear Physics Vol. 91 Journal Issue: 5; ISSN 0556-2813

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 31 works

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