A1 Journal article (refereed)
High-Precision Q-Value Measurement Confirms the Potential of 135Cs for Absolute Antineutrino Mass Scale Determination (2020)

de Roubin, A., Kostensalo, J., Eronen, T., Canete, L., de Groote, R. P., Jokinen, A., Kankainen, A., Nesterenko, D. A., Moore, I. D., Rinta-Antila, S., Suhonen, J., & Vilén, M. (2020). High-Precision Q-Value Measurement Confirms the Potential of 135Cs for Absolute Antineutrino Mass Scale Determination. Physical Review Letters, 124(22), Article 222503. https://doi.org/10.1103/PhysRevLett.124.222503

JYU authors or editors

Publication details

All authors or editors: de Roubin, A.; Kostensalo, J.; Eronen, T.; Canete, L.; de Groote, R. P.; Jokinen, A.; Kankainen, A.; Nesterenko, D. A.; Moore, I. D.; Rinta-Antila, S.; et al.

Journal or series: Physical Review Letters

ISSN: 0031-9007

eISSN: 1079-7114

Publication year: 2020

Volume: 124

Issue number: 22

Article number: 222503

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevLett.124.222503

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/70028


The ground-state-to-ground-state β-decay Q value of 135Cs(7/2+)→135Ba(3/2+) has been directly measured for the first time. The measurement was done utilizing both the phase-imaging ion-cyclotron resonance technique and the time-of-flight ion-cyclotron resonance technique at the JYFLTRAP Penning-trap setup and yielded a mass difference of 268.66(30) keV between 135Cs(7/2+) and 135Ba(3/2+). With this very small uncertainty, this measurement is a factor of 3 more precise than the currently adopted Q value in the Atomic Mass Evaluation 2016. The measurement confirms that the first-forbidden unique β—decay transition 135Cs(7/2+)→135Ba(11/2−) is a candidate for antineutrino mass measurements with an ultralow Q value of 0.44(31) keV. This Q value is almost an order of magnitude smaller than those of nuclides presently used in running or planned direct (anti)neutrino mass experiment.

Keywords: nuclear physics; particle physics; neutrinos

Free keywords: particles and fields; nuclear physics

Contributing organizations

Related projects

Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 3

Last updated on 2021-09-08 at 18:08