A1 Journal article (refereed)
Measurement of the Spectral Shape of the β-Decay of 137Xe to the Ground State of 137Cs in EXO-200 and Comparison with Theory (2020)


EXO-200 Collaboration. (2020). Measurement of the Spectral Shape of the β-Decay of 137Xe to the Ground State of 137Cs in EXO-200 and Comparison with Theory. Physical Review Letters, 124(23), Article 232502. https://doi.org/10.1103/PhysRevLett.124.232502


JYU authors or editors


Publication details

All authors or editorsEXO-200 Collaboration

Journal or seriesPhysical Review Letters

ISSN0031-9007

eISSN1079-7114

Publication year2020

Volume124

Issue number23

Article number232502

PublisherAmerican Physical Society

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/PhysRevLett.124.232502

Publication open accessNot open

Publication channel open access

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/71083

Publication is parallel publishedhttps://arxiv.org/abs/2002.00108


Abstract

We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden nonunique β-decay transition 137Xe(7/2−)→137Cs(7/2+). The experimental data were acquired by the EXO-200 experiment during a deployment of an AmBe neutron source. The ultralow background environment of EXO-200, together with dedicated source deployment and analysis procedures, allowed for collection of a pure sample of the decays, with an estimated signal to background ratio of more than 99 to 1 in the energy range from 1075 to 4175 keV. In addition to providing a rare and accurate measurement of the first-forbidden nonunique β-decay shape, this work constitutes a novel test of the calculated electron spectral shapes in the context of the reactor antineutrino anomaly and spectral bump.


Keywordsnuclear physicsparticle physics


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Ministry reportingYes

VIRTA submission year2020

JUFO rating3


Last updated on 2024-12-10 at 06:45