Measurement of the Spectral Shape of the β-Decay of ^{137}Xe to the Ground State of ^{137}Cs in EXO-200 and Comparison with Theory

S Al Kharusi¹, G Anton², I Badhrees³, P S Barbeau⁴, D Beck⁵, V Belov⁶, T Bhatta⁷, M Breidenbach⁸, T Brunner^{1

9}, G F Cao¹⁰, W R Cen¹⁰, C Chambers¹, B Cleveland¹¹, M Coon⁵, A Craycraft¹², T Daniels¹³, L Darroch¹, S J Daugherty¹⁴, J Davis⁸, S Delaquis⁸, A Der Mesrobian-Kabakian¹¹, R DeVoe¹⁵, J Dilling⁹, A Dolgolenko⁶, M J Dolinski¹⁶, J Echevers⁵, W Fairbank¹², D Fairbank¹², J Farine¹¹, S Feyzbakhsh¹⁷, P Fierlinger¹⁸, D Fudenberg¹⁵, P Gautam¹⁶, R Gornea^{3

9}, G Gratta¹⁵, C Hall¹⁹, E V Hansen¹⁶, J Hoessl², P Hufschmidt², M Hughes²⁰, A Iverson¹², A Jamil²¹, C Jessiman³, M J Jewell¹⁵, A Johnson⁸, A Karelin⁶, L J Kaufman⁸, T Koffas³, J Kostensalo²², R Krücken⁹, A Kuchenkov⁶, K S Kumar¹⁷, Y Lan⁹, A Larson⁷, B G Lenardo¹⁵, D S Leonard²³, G S Li¹⁵, S Li⁵, Z Li²¹, C Licciardi¹¹, Y H Lin¹⁶, R MacLellan⁷, T McElroy¹, T Michel², B Mong⁸, D C Moore²¹, K Murray¹, P Nakarmi²⁰, O Njoya²⁴, O Nusair²⁰, A Odian⁸, I Ostrovskiy²⁰, A Piepke²⁰, A Pocar¹⁷, F Retière⁹, A L Robinson¹¹, P C Rowson⁸, D Ruddell¹³, J Runge⁴, S Schmidt², D Sinclair^{3

9}, K Skarpaas⁸, A K Soma²⁰, V Stekhanov⁶, J Suhonen²², M Tarka¹⁷, S Thibado¹⁷, J Todd¹², T Tolba¹⁰, T I Totev¹, R Tsang²⁰, B Veenstra³, V Veeraraghavan²⁰, P Vogel²⁵, J-L Vuilleumier²⁶, M Wagenpfeil², J Watkins³, M Weber¹⁵, L J Wen¹⁰, U Wichoski¹¹, G Wrede², S X Wu¹⁵, Q Xia²¹, D R Yahne¹², L Yang²⁷, Y-R Yen¹⁶, O Ya Zeldovich⁶, T Ziegler²; EXO-200 Collaboration

Affiliations

¹ Physics Department, McGill University, Montreal, Quebec H3A 2T8, Canada.
² Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander University Erlangen-Nürnberg, Erlangen 91058, Germany.
³ Physics Department, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
⁴ Department of Physics, Duke University, and Triangle Universities Nuclear Laboratory (TUNL), Durham, North Carolina 27708, USA.
⁵ Physics Department, University of Illinois, Urbana-Champaign, Illinois 61801, USA.
⁶ Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National Research Centre "Kurchatov Institute", Moscow 117218, Russia.
⁷ Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA.
⁸ SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
⁹ TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
¹⁰ Institute of High Energy Physics, Beijing 100049, China.
¹¹ Department of Physics, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
¹² Physics Department, Colorado State University, Fort Collins, Colorado 80523, USA.
¹³ Department of Physics and Physical Oceanography, University of North Carolina at Wilmington, Wilmington, North Carolina 28403, USA.
¹⁴ Physics Department and CEEM, Indiana University, Bloomington, Indiana 47405, USA.
¹⁵ Physics Department, Stanford University, Stanford, California 94305, USA.
¹⁶ Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA.
¹⁷ Amherst Center for Fundamental Interactions and Physics Department, University of Massachusetts, Amherst, Massachusetts 01003, USA.
¹⁸ Technische Universität München, Physikdepartment and Excellence Cluster Universe, Garching 80805, Germany.
¹⁹ Physics Department, University of Maryland, College Park, Maryland 20742, USA.
²⁰ Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487, USA.
²¹ Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut 06511, USA.
²² University of Jyväskylä, Department of Physics, P.O. Box 35 (YFL), Jyväskylä FI-40014, Finland.
²³ IBS Center for Underground Physics, Daejeon 34126, Korea.
²⁴ Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USA.
²⁵ Kellogg Lab, Caltech, Pasadena, California 91125, USA.
²⁶ LHEP, Albert Einstein Center, University of Bern, Bern CH-3012, Switzerland.
²⁷ Department of Physics, University of California San Diego, La Jolla, California 92093, USA.

PMID: 32603173
DOI: 10.1103/PhysRevLett.124.232502

Measurement of the Spectral Shape of the β-Decay of ^{137}Xe to the Ground State of ^{137}Cs in EXO-200 and Comparison with Theory

S Al Kharusi et al. Phys Rev Lett. 2020.

. 2020 Jun 12;124(23):232502.

doi: 10.1103/PhysRevLett.124.232502.

Authors

Affiliations

¹ Physics Department, McGill University, Montreal, Quebec H3A 2T8, Canada.
² Erlangen Centre for Astroparticle Physics (ECAP), Friedrich-Alexander University Erlangen-Nürnberg, Erlangen 91058, Germany.
³ Physics Department, Carleton University, Ottawa, Ontario K1S 5B6, Canada.
⁴ Department of Physics, Duke University, and Triangle Universities Nuclear Laboratory (TUNL), Durham, North Carolina 27708, USA.
⁵ Physics Department, University of Illinois, Urbana-Champaign, Illinois 61801, USA.
⁶ Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of National Research Centre "Kurchatov Institute", Moscow 117218, Russia.
⁷ Department of Physics, University of South Dakota, Vermillion, South Dakota 57069, USA.
⁸ SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA.
⁹ TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
¹⁰ Institute of High Energy Physics, Beijing 100049, China.
¹¹ Department of Physics, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
¹² Physics Department, Colorado State University, Fort Collins, Colorado 80523, USA.
¹³ Department of Physics and Physical Oceanography, University of North Carolina at Wilmington, Wilmington, North Carolina 28403, USA.
¹⁴ Physics Department and CEEM, Indiana University, Bloomington, Indiana 47405, USA.
¹⁵ Physics Department, Stanford University, Stanford, California 94305, USA.
¹⁶ Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA.
¹⁷ Amherst Center for Fundamental Interactions and Physics Department, University of Massachusetts, Amherst, Massachusetts 01003, USA.
¹⁸ Technische Universität München, Physikdepartment and Excellence Cluster Universe, Garching 80805, Germany.
¹⁹ Physics Department, University of Maryland, College Park, Maryland 20742, USA.
²⁰ Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama 35487, USA.
²¹ Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut 06511, USA.
²² University of Jyväskylä, Department of Physics, P.O. Box 35 (YFL), Jyväskylä FI-40014, Finland.
²³ IBS Center for Underground Physics, Daejeon 34126, Korea.
²⁴ Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USA.
²⁵ Kellogg Lab, Caltech, Pasadena, California 91125, USA.
²⁶ LHEP, Albert Einstein Center, University of Bern, Bern CH-3012, Switzerland.
²⁷ Department of Physics, University of California San Diego, La Jolla, California 92093, USA.

PMID: 32603173
DOI: 10.1103/PhysRevLett.124.232502

Abstract

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.

PubMed Disclaimer

LinkOut - more resources

Full Text Sources
- American Physical Society

Save citation to file

Email citation

Add to Collections

Add to My Bibliography

Your saved search

Create a file for external citation management software

Your RSS Feed

Measurement of the Spectral Shape of the β-Decay of ^{137}Xe to the Ground State of ^{137}Cs in EXO-200 and Comparison with Theory

Affiliations

Measurement of the Spectral Shape of the β-Decay of ^{137}Xe to the Ground State of ^{137}Cs in EXO-200 and Comparison with Theory

Authors

Affiliations

Abstract

LinkOut - more resources

Full Text Sources