Measurement of the Antineutrino Spectrum from U 235 Fission at HFIR with PROSPECT

(PROSPECT Collaboration)

doi:10.1103/PhysRevLett.122.251801

Measurement of the Antineutrino Spectrum from U 235 Fission at HFIR with PROSPECT

(PROSPECT Collaboration)

Physics

Yale University
University of Wisconsin-Madison
Le Moyne College
National Institute of Standards and Technology
Temple University
Lawrence Livermore National Laboratory
Oak Ridge National Laboratory
Georgia Institute of Technology
University of Waterloo
College of William and Mary
Oak Ridge National Laboratory
Brookhaven National Laboratory
Drexel University
University of Tennessee
Illinois Institute of Technology
University of Alberta
City University of New York
South Dakota School of Mines & Technology

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

This Letter reports the first measurement of the U235 νe energy spectrum by PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, operating 7.9 m from the 85 MWth highly enriched uranium (HEU) High Flux Isotope Reactor. With a surface-based, segmented detector, PROSPECT has observed 31678±304(stat) νe-induced inverse beta decays, the largest sample from HEU fission to date, 99% of which are attributed to U235. Despite broad agreement, comparison of the Huber U235 model to the measured spectrum produces a χ2/ndf=51.4/31, driven primarily by deviations in two localized energy regions. The measured U235 spectrum shape is consistent with a deviation relative to prediction equal in size to that observed at low-enriched uranium power reactors in the νe energy region of 5-7 MeV.

Original language	English
Article number	251801
Journal	Physical Review Letters
Volume	122
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.122.251801
State	Published - Jun 28 2019

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10.1103/PhysRevLett.122.251801

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@article{e7a1bed1e7314b9eb0c8fe5fabb0bf05,

title = "Measurement of the Antineutrino Spectrum from U 235 Fission at HFIR with PROSPECT",

abstract = "This Letter reports the first measurement of the U235 νe energy spectrum by PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, operating 7.9 m from the 85 MWth highly enriched uranium (HEU) High Flux Isotope Reactor. With a surface-based, segmented detector, PROSPECT has observed 31678±304(stat) νe-induced inverse beta decays, the largest sample from HEU fission to date, 99\% of which are attributed to U235. Despite broad agreement, comparison of the Huber U235 model to the measured spectrum produces a χ2/ndf=51.4/31, driven primarily by deviations in two localized energy regions. The measured U235 spectrum shape is consistent with a deviation relative to prediction equal in size to that observed at low-enriched uranium power reactors in the νe energy region of 5-7 MeV.",

author = "\{(PROSPECT Collaboration)\} and J. Ashenfelter and Balantekin, \{A. B.\} and Band, \{H. R.\} and Bass, \{C. D.\} and Bergeron, \{D. E.\} and D. Berish and Bowden, \{N. S.\} and Brodsky, \{J. P.\} and Bryan, \{C. D.\} and Cherwinka, \{J. J.\} and T. Classen and Conant, \{A. J.\} and Cox, \{A. A.\} and D. Davee and D. Dean and G. Deichert and Diwan, \{M. V.\} and Dolinski, \{M. J.\} and A. Erickson and M. Febbraro and Foust, \{B. T.\} and Gaison, \{J. K.\} and A. Galindo-Uribarri and Gilbert, \{C. E.\} and Gilje, \{K. E.\} and Hackett, \{B. T.\} and S. Hans and Hansell, \{A. B.\} and Heeger, \{K. M.\} and J. Insler and Jaffe, \{D. E.\} and X. Ji and Jones, \{D. C.\} and O. Kyzylova and Lane, \{C. E.\} and Langford, \{T. J.\} and J. Larosa and Littlejohn, \{B. R.\} and X. Lu and \{Martinez Caicedo\}, \{D. A.\} and Matta, \{J. T.\} and McKeown, \{R. D.\} and Mendenhall, \{M. P.\} and Minock, \{J. M.\} and Mueller, \{P. E.\} and Mumm, \{H. P.\} and J. Napolitano and R. Neilson and Nikkel, \{J. A.\} and D. Sarenac",

note = "Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = jun,

day = "28",

doi = "10.1103/PhysRevLett.122.251801",

language = "English",

volume = "122",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "25",

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TY - JOUR

T1 - Measurement of the Antineutrino Spectrum from U 235 Fission at HFIR with PROSPECT

AU - (PROSPECT Collaboration)

AU - Ashenfelter, J.

AU - Balantekin, A. B.

AU - Band, H. R.

AU - Bass, C. D.

AU - Bergeron, D. E.

AU - Berish, D.

AU - Bowden, N. S.

AU - Brodsky, J. P.

AU - Bryan, C. D.

AU - Cherwinka, J. J.

AU - Classen, T.

AU - Conant, A. J.

AU - Cox, A. A.

AU - Davee, D.

AU - Dean, D.

AU - Deichert, G.

AU - Diwan, M. V.

AU - Dolinski, M. J.

AU - Erickson, A.

AU - Febbraro, M.

AU - Foust, B. T.

AU - Gaison, J. K.

AU - Galindo-Uribarri, A.

AU - Gilbert, C. E.

AU - Gilje, K. E.

AU - Hackett, B. T.

AU - Hans, S.

AU - Hansell, A. B.

AU - Heeger, K. M.

AU - Insler, J.

AU - Jaffe, D. E.

AU - Ji, X.

AU - Jones, D. C.

AU - Kyzylova, O.

AU - Lane, C. E.

AU - Langford, T. J.

AU - Larosa, J.

AU - Littlejohn, B. R.

AU - Lu, X.

AU - Martinez Caicedo, D. A.

AU - Matta, J. T.

AU - McKeown, R. D.

AU - Mendenhall, M. P.

AU - Minock, J. M.

AU - Mueller, P. E.

AU - Mumm, H. P.

AU - Napolitano, J.

AU - Neilson, R.

AU - Nikkel, J. A.

AU - Sarenac, D.

PY - 2019/6/28

Y1 - 2019/6/28

N2 - This Letter reports the first measurement of the U235 νe energy spectrum by PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, operating 7.9 m from the 85 MWth highly enriched uranium (HEU) High Flux Isotope Reactor. With a surface-based, segmented detector, PROSPECT has observed 31678±304(stat) νe-induced inverse beta decays, the largest sample from HEU fission to date, 99% of which are attributed to U235. Despite broad agreement, comparison of the Huber U235 model to the measured spectrum produces a χ2/ndf=51.4/31, driven primarily by deviations in two localized energy regions. The measured U235 spectrum shape is consistent with a deviation relative to prediction equal in size to that observed at low-enriched uranium power reactors in the νe energy region of 5-7 MeV.

AB - This Letter reports the first measurement of the U235 νe energy spectrum by PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, operating 7.9 m from the 85 MWth highly enriched uranium (HEU) High Flux Isotope Reactor. With a surface-based, segmented detector, PROSPECT has observed 31678±304(stat) νe-induced inverse beta decays, the largest sample from HEU fission to date, 99% of which are attributed to U235. Despite broad agreement, comparison of the Huber U235 model to the measured spectrum produces a χ2/ndf=51.4/31, driven primarily by deviations in two localized energy regions. The measured U235 spectrum shape is consistent with a deviation relative to prediction equal in size to that observed at low-enriched uranium power reactors in the νe energy region of 5-7 MeV.

UR - https://www.scopus.com/pages/publications/85068602267

U2 - 10.1103/PhysRevLett.122.251801

DO - 10.1103/PhysRevLett.122.251801

M3 - Article

C2 - 31347897

AN - SCOPUS:85068602267

SN - 0031-9007

VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

IS - 25

M1 - 251801

ER -

Measurement of the Antineutrino Spectrum from U 235 Fission at HFIR with PROSPECT

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