Q value of the 100Mo Double-Beta Decay
S. Rahaman, V.-V. Elomaa, T. Eronen, J. Hakala, A. Jokinen, J. Julin,, A. Kankainen, A. Saastamoinen, J. Suhonen, C. Weber, J. \"Ayst\"o
TL;DR
This paper presents highly precise measurements of the double-beta decay Q-values for 100Mo and 76Ge, significantly improving the accuracy for 100Mo, which is crucial for neutrinoless double-beta decay research.
Contribution
The study provides the most precise Q-value for 100Mo to date, enhancing the accuracy of decay parameter calculations and supporting ongoing neutrinoless double-beta decay experiments.
Findings
Q-value for 76Ge agrees with previous measurements
Q-value for 100Mo is 30 times more precise than prior data
Precise Q-values enable better phase-space and nuclear matrix element calculations
Abstract
Penning trap measurements using mixed beams of 100Mo - 100Ru and 76Ge - 76Se have been utilized to determine the double-beta decay Q-values of 100Mo and 76Ge with uncertainties less than 200 eV. The value for 76Ge, 2039.04(16) keV is in agreement with the published SMILETRAP value. 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.
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