A1 Journal article (refereed)
Constraints on partial half-lives of 136Ce and 138Ce double electron captures (2022)

Lehnert, B., Hult, M., Lutter, G., Marissens, G., Oberstedt, S., Stroh, H., Kotila, J., Oberstedt, A., & Zuber, K. (2022). Constraints on partial half-lives of 136Ce and 138Ce double electron captures. Physical Review C, 105(4), Article 045801. https://doi.org/10.1103/PhysRevC.105.045801

JYU authors or editors

Publication details

All authors or editors: Lehnert, B.; Hult, M.; Lutter, G.; Marissens, G.; Oberstedt, S.; Stroh, H.; Kotila, J.; Oberstedt, A.; Zuber, K.

Journal or series: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Publication year: 2022

Publication date: 04/04/2022

Volume: 105

Issue number: 4

Article number: 045801

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevC.105.045801

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/81804

Abstract

The γ-ray emissions from a radiopure cerium-bromide crystal with a mass of 4381 g were measured for a total of 497.4 d by means of high-resolution γ-ray spectrometry in the HADES underground laboratory at a depth of 500 m.w.e. A search for 0/2νεε and 0/2νεβ+ double beta decay transitions of 136Ce and 138Ce was performed using Bayesian analysis techniques. No signals were observed for a total of 35 investigated decay modes. 90% credibility limits were set in the order of 1018–1019 yr. Existing constraints from a cerium oxide powder measurement were tested with a different cerium compound and half-life limits could be improved for most of the decay modes. The most likely accessible decay mode of the 136Ce 2νεε transition into the 0+1 state of 136Ba results in a new best 90% credibility limit of 5.0×1018 yr.

Keywords: nuclear physics; half life

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Ministry reporting: Yes

Reporting Year: 2022

JUFO rating: 2