Q values of the 76Ge and 100Mo double-beta decays

doi:10.1016/j.physletb.2008.02.047

Physics Letters B

Volume 662, Issue 2, 17 April 2008, Pages 111-116

https://doi.org/10.1016/j.physletb.2008.02.047 Get rights and content

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Abstract

Penning trap measurements using mixed beams of ⁷⁶Ge–⁷⁶Se and ¹⁰⁰Mo–¹⁰⁰Ru have been utilized to determine the double-beta decay Q-values of ⁷⁶Ge and ¹⁰⁰Mo with uncertainties less than 200 eV. The value for ⁷⁶Ge, 2039.04(16) keV is in agreement with the published SMILETRAP value, 2039.006(50) keV. The new value for ¹⁰⁰Mo, 3034.40(17) keV is 30 times more precise than the previous literature value, sufficient for the ongoing neutrinoless double-beta decay searches in ¹⁰⁰Mo. Moreover, the precise Q-value is used to calculate the phase-space integrals and the experimental nuclear matrix element of double-beta decay.

PACS

07.75.+h

82.80.Qx

23.40.-s

23.40.Bw

23.40.Hc

Keywords

Penning trap

Double-beta decay

Q-value

Phase-space integral

Neutrino mass