https://doi.org/10.1140/epja/s10050-022-00695-w
Regular Article - Experimental Physics
High-precision Q-value measurement and nuclear matrix element calculations for the double-
decay of 
Mo
1
Accelerator Laboratory, Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014, Jyvaskyla, Finland
2
Department of Quantum Physics and Astrophysics and Institute of Cosmos Sciences, University of Barcelona, 08028, Barcelona, Spain
3
Sloane Physics Laboratory, Center for Theoretical Physics, Yale University, 06520-8120, New Haven, CT, USA
Received:
9
November
2021
Accepted:
22
February
2022
Published online:
14
March
2022
The Mo double-beta decay Q-value has been measured, and the corresponding nuclear matrix elements of neutrinoless double-beta (
) decay and the standard two-neutrino double-beta (
) decay have been provided by nuclear theory. The double-beta decay Q-value has been determined as 
keV using the JYFLTRAP Penning trap mass spectrometer. It is in agreement with the literature value, 
keV, but almost 90 times more precise. Based on the measured Q-value, precise phase-space factors for decay and decay, needed in the half-life predictions, have been calculated. Furthermore, the involved nuclear matrix elements have been computed in the proton–neutron quasiparticle random-phase approximation (pnQRPA) and the microscopic interacting boson model (IBM-2) frameworks. Finally, predictions for the decay are given, suggesting a much longer half-life than for the currently observed cases.
© The Author(s) 2022
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
