Regular Article - Experimental Physics
High-precision Q-value measurement and nuclear matrix element calculations for the double- decay of Mo
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
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
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