@article{82bcc002bce642f6b5e35ec8560c86cc,
title = "Measurement of the Spectral Shape of the β-Decay of Xe 137 to the Ground State of Cs 137 in EXO-200 and Comparison with Theory",
abstract = "We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden nonunique β-decay transition Xe137(7/2-)→Cs137(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.",
author = "{EXO-200 Collaboration} and {Al Kharusi}, S. and G. Anton and I. Badhrees and Barbeau, {P. S.} and D. Beck and V. Belov and T. Bhatta and M. Breidenbach and T. Brunner and Cao, {G. F.} and Cen, {W. R.} and C. Chambers and B. Cleveland and M. Coon and A. Craycraft and T. Daniels and L. Darroch and Daugherty, {S. J.} and J. Davis and S. Delaquis and {Der Mesrobian-Kabakian}, A. and R. Devoe and J. Dilling and A. Dolgolenko and Dolinski, {M. J.} and J. Echevers and W. Fairbank and D. Fairbank and J. Farine and S. Feyzbakhsh and P. Fierlinger and D. Fudenberg and P. Gautam and R. Gornea and G. Gratta and C. Hall and Hansen, {E. V.} and J. Hoessl and P. Hufschmidt and M. Hughes and A. Iverson and A. Jamil and C. Jessiman and Jewell, {M. J.} and A. Johnson and A. Karelin and Kaufman, {L. J.} and T. Koffas and J. Kostensalo and R. Kr{\"u}cken",
note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society.",
year = "2020",
month = jun,
day = "12",
doi = "10.1103/PhysRevLett.124.232502",
language = "English",
volume = "124",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "23",
}