Total Absorption Spectroscopy Study of ⁹²Rb Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape

Sonzogni, A.; Zakari-Issoufou, A. -A.; Fallot, M.; Porta, A.; Algora, A.; Tain, J. L.; Valencia, E.; Rice, S.; Bui, V. M.; Cormon, S.; Estienne, M.; Agramunt, J.; Aysto, J.; Bowry, M.; Briz Monago, J. A.; Caballero-Folch, R.; Cano-Ott, D.; Cucoanes, A.; Eloma, V.; Estvez, E.; Farrelly, G. F.; Garcia, A.; Gelletly, W.; Gomez-Hornillos, M. B.; Gorlychev, V.; Hakala, J.; Jokinen, A.; Jordan, M. D.; Kankainen, A.; Kondev, F. G.; Martinez, T.; Mendoza, E.; Molina, F.; Moore, I.; Perez, A.; Podolyak, Zs.; Penttil, H.; Regan, P. H.; Shiba, T.; Rissanen, J.; Rubio, B.; Weber, C.

doi:10.1103/PhysRevLett.115.102503

Title: Total Absorption Spectroscopy Study of ⁹²Rb Decay: A Major Contributor to Reactor Antineutrino Spectrum Shape

Journal Article · Mon Mar 09 00:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.115.102503· OSTI ID:1183877

Sonzogni, A. ^[1]; Zakari-Issoufou, A. -A. ^[2]; Fallot, M. ^[2]; Porta, A. ^[2]; Algora, A. ^[3]; Tain, J. L. ^[4]; Valencia, E. ^[4]; Rice, S. ^[5]; Bui, V. M. ^[2]; Cormon, S. ^[2]; Estienne, M. ^[2]; Agramunt, J. ^[4]; Aysto, J. ^[6]; Bowry, M. ^[5]; Briz Monago, J. A. ^[2]; Caballero-Folch, R. ^[7]; Cano-Ott, D. ^[8]; Cucoanes, A. ^[2]; Eloma, V. ^[6]; Estvez, E. ^[4] more »

Brookhaven National Lab. (BNL), Upton, NY (United States); National Physical Lab., Teddington (United Kingdom)
Univ. de Nantes, Nantes (France)
IFIC (CSIC-Univ.), Valencia (Spain); MTA ATOMKI (Hungary)
IFIC (CSIC-Univ.), Valencia (Spain)
Univ. Surrey, Guildford (United Kingdom)
IGISOL Univ., Jyvaskyla (Finland)
Univ. Politecnica de Catalunya (Spain)
Research Centre for Energy, Environment and Technology (CIEMAT), Madrid (Spain)
Argonne National Lab. (ANL), Argonne, IL (United States)

The accurate determination of the emitted reactor antineutrino flux is still a major challenge for actual and future neutrino experiments at reactors, especially after the evidence of a disagreement between the measured antineutrino energy spectrum by Double Chooz, Daya Bay, and Reno and calculated antineutrino spectra obtained from the conversion of the unique integral beta spectra measured at the ILL reactor. Using nuclear data to compute reactor antineutrino spectra may help understanding this bias, with the study of the underlying nuclear physics. Summation calculations allow identifying a list of nuclei that contribute importantly to the antineutrino energy spectra emitted after the fission of ²³⁹^,²⁴¹Pu and ²³⁵^,²³⁸U, and whose beta decay properties might deserve new measurements. Among these nuclei, ⁹²Rb exhausts by itself about 16% of of the antineutrino energy spectrum emitted by Pressurized Water Reactors in the 5 to 8 MeV range. In this Letter, we report new Total Absorption Spectroscopy (TAS) results for this important contributor. The obtained beta feeding from ⁹²Rb shows beta intensity unobserved before in the 4.5 to 5.5 MeV energy region and gives a ground state to ground state branch of 87.5 % ± 3%. These new data induce a dramatic change in recent summation calculations where a 51% GS to GS branch was considered for ⁹²Rb, increasing the summation antineutrino spectrum in the region nearby the observed bias.The new data still have an important impact on other summation calculations in which more recent data were considered

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: IGISOL Collaboration

Grant/Contract Number:: SC00112704; AC02-06CH11357

OSTI ID:: 1183877

Alternate ID(s):: OSTI ID: 1213966

Report Number(s):: BNL-108023-2015-JA; PRLTAO; R&D Project: EST-003-NEFA; KB0301041

Journal Information:: Physical Review Letters, Vol. 115, Issue 10; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 63 works

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The PROSPECT physics program Ashenfelter, J.; Balantekin, A. B.; Band, H. R. Journal of Physics G: Nuclear and Particle Physics, Vol. 43, Issue 11 https://doi.org/10.1088/0954-3899/43/11/113001	journal	October 2016
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Getting the most neutrinos out of IsoDAR Ciuffoli, Emilio; Mohammed, Hosam; Evslin, Jarah The European Physical Journal C, Vol. 77, Issue 12 https://doi.org/10.1140/epjc/s10052-017-5439-8	journal	December 2017
Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay Collaboration, Daya Bay; An, F. P.; Balantekin, A. B. arXiv https://doi.org/10.48550/arxiv.1508.04233	text	January 2015
Getting the Most Neutrinos out of IsoDAR Ciuffoli, Emilio; Mohammed, Hosam; Evslin, Jarah arXiv https://doi.org/10.48550/arxiv.1606.09451	text	January 2016
Fuel-composition dependent reactor antineutrino yield at RENO Collaboration, The RENO arXiv https://doi.org/10.48550/arxiv.1806.00574	text	January 2018
First-forbidden transitions in the reactor anomaly Hayen, Leendert; Kostensalo, Joel; Severijns, Nathal arXiv https://doi.org/10.48550/arxiv.1908.08302	text	January 2019

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