Measurement of the Spectral Shape of the β -Decay of Xe137 to the Ground State of Cs137 in EXO-200 and Comparison with Theory

6533b859fe1ef96bd12b80b3

RESEARCH PRODUCT

Measurement of the Spectral Shape of the β -Decay of Xe137 to the Ground State of Cs137 in EXO-200 and Comparison with Theory

T. Tolba E. V. Hansen Qing Xia A. Jamil A. Pocar S. Thibado V. Veeraraghavan C. Chambers R. Devoe Petr Vogel David Leonard R. Maclellan Thomas Koffas D. Fudenberg W. M. Fairbank M. Coon J. Davis M. J. Jewell T. Daniels F. Retiere V.n. Stekhanov L. J. Kaufman J. Farine Jouni Suhonen A. Piepke J. Todd R. Tsang M. J. Dolinski Jens Dilling O. Nusair L. Darroch R. Krücken U. Wichoski M. Hughes I. Badhrees K. Skarpaas J. Hoessl V. Belov A. Robinson T. Bhatta A. S. Johnson T. Ziegler S. Feyzbakhsh W. R. Cen K. Murray S. Al Kharusi O. Ya. Zeldovich G. S. Li R. Gornea R. Gornea Martin Breidenbach M. Wagenpfeil Anton12 Gisela P. Hufschmidt David A. Sinclair David A. Sinclair P. C. Rowson S. X. Wu B. Mong J. L. Vuilleumier Arun Kumar Soma C. Licciardi A. Der Mesrobian-kabakian Yuehe Lin S. J. Daugherty A. Odian L. Yang David Moore Y. Lan S. Delaquis Z. Li Guofu Cao Giorgio Gratta A. Larson T. Brunner T. Brunner C. R. Hall A. Dolgolenko Thilo Michel C. Jessiman I. Ostrovskiy P. Nakarmi A. Craycraft K. S. Kumar B. T. Cleveland A. Kuchenkov O. Njoya B. G. Lenardo J. Watkins A. Iverson D. R. Yahne T. Mcelroy A. Karelin Shu Li S. Schmidt L. J. Wen Marc Weber D. Fairbank B. Veenstra J. Kostensalo J. Echevers Peter Fierlinger T. I. Totev Gerrit Wrede M. Tarka Douglas H Beck P. S. Barbeau Y-r Yen D. Ruddell J. Runge P. Gautam

subject

Physics Spectral shape analysis General Physics and Astronomy Nuclear data Context (language use)Electron 7. Clean energy 01 natural sciences Spectral line 0103 physical sciences Neutron source Atomic physics 010306 general physics Ground state Energy (signal processing)

description

We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden nonunique β-decay transition ^{137}Xe(7/2^{-})→^{137}Cs(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.

year	journal	country	edition	language
2020-06-12	Physical Review Letters

https://doi.org/10.1103/physrevlett.124.232502