A1 Journal article (refereed)
Direct determination of the atomic mass difference of the pairs 76As−76Se and 155Tb−155Gd rules out 76As and 155 Tb as possible candidates for electron (anti)neutrino mass measurements (2022)


Ge, Z., Eronen, T., de Roubin, A., Kostensalo, J., Suhonen, J., Nesterenko, D. A., Beliuskina, O., de Groote, R., Delafosse, C., Geldhof, S., Gins, W., Hukkanen, M., Jokinen, A., Kankainen, A., Kotila, J., Koszorús, Á., Moore, I. D., Raggio, A., Rinta-Antila, S., . . . Zadvornaya, A. (2022). Direct determination of the atomic mass difference of the pairs 76As−76Se and 155Tb−155Gd rules out 76As and 155 Tb as possible candidates for electron (anti)neutrino mass measurements. Physical Review C, 106(1), Article 015502. https://doi.org/10.1103/PhysRevC.106.015502


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Publication details

All authors or editorsGe, Z.; Eronen, T.; de Roubin, A.; Kostensalo, J.; Suhonen, J.; Nesterenko, D. A.; Beliuskina, O.; de Groote, R.; Delafosse, C.; Geldhof, S.; et al.

Journal or seriesPhysical Review C

ISSN2469-9985

eISSN2469-9993

Publication year2022

Publication date13/07/2022

Volume106

Issue number1

Article number015502

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/PhysRevC.106.015502

Publication open accessNot open

Publication channel open access

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/82818

Web address of parallel published publication (pre-print)https://arxiv.org/abs/2202.07656


Abstract

The first direct determination of the ground-state–to–ground-state Q values of the β− decay 76As→76Se and the electron-capture decay 155Tb→155Gd was performed utilizing the double Penning trap mass spectrometer JYFLTRAP. By measuring the atomic mass difference of the decay pairs via the phase-imaging ion-cyclotron-resonance technique, the Q values of 76As→76Se and 155Tb→155Gd were determined to be 2959.265(74) keV and 814.94(18) keV, respectively. The precision was increased relative to earlier measurements by factors of 12 and 57, respectively. The new Q values are 1.33 keV and 5 keV lower compared to the values adopted in the most recent Atomic Mass Evaluation 2020. With the newly determined ground-state–to–ground-state Q values combined with the excitation energy from γ-ray spectroscopy, the Q values for ground-state–to–excited-state transitions 76As (ground state) →76Se∗ (2968.4(7) keV) and 155Tb (ground state) →155Gd∗ (815.731(3) keV) were derived to be −9.13(70) keV and −0.79(18) keV. Thus we have confirmed that both of the β−-decay and EC-decay candidate transitions are energetically forbidden at a level of at least 4σ, thus definitely excluding these two cases from the list of potential candidates for the search of low-Q-value β− or EC decays to determine the electron-(anti)neutrino mass.


Keywordsnuclear physicsparticle physicsneutrinos


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Ministry reportingYes

Reporting Year2022

JUFO rating2


Last updated on 2024-30-04 at 18:55