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

Abstract

This Letter reports the first measurement of the 235U ν¯ e energy spectrum by PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, operating 7.9m from the 85MW th highly-enriched uranium (HEU) High Flux Isotope Reactor. With a surface-based, segmented detector, PROSPECT has observed 31678 ± 304 (stat.) ν¯ e-induced inverse beta decays (IBD), the largest sample from HEU fission to date, 99% of which are attributed to 235U. Despite broad agreement, comparison of the Huber 235U model to the measured spectrum produces a χ 2 /ndf = 51.4/31, driven primarily by deviations in two localized energy regions. As a result, the measured 235U spectrum shape is consistent with a deviation relative to prediction equal in size to that observed at low-enriched uranium power reactors in the ν¯ e energy region of 5-7MeV.

Authors:
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Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Yale Univ., New Haven, CT (United States); Drexel Univ., Philadelphia, PA (United States); Illinois Inst. of Technology, Chicago, IL (United States); Temple Univ., Philadelphia, PA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); USDOE National Nuclear Security Administration (NNSA)
Contributing Org.:
[PROSPECT Collaboration 3]
OSTI Identifier:
1542278
Alternate Identifier(s):
OSTI ID: 1546314; OSTI ID: 1557949; OSTI ID: 1564220; OSTI ID: 1595061
Report Number(s):
[BNL-211845-2019-JAAM; LLNL-JRNL-767132]
[Journal ID: ISSN 0031-9007; PRLTAO]
Grant/Contract Number:  
[SC0012704; SC0016357; SC0017660; SC0017815; SC0008347; SC0016060; AC52-07NA27344; AC05-00OR22725]
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
[ Journal Volume: 122; Journal Issue: 25]; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; reactor; antineutrino; oscillations; Physics - Nuclear physics and radiation physics; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Ashenfelter, J., Balantekin, A. B., Band, H. R., Bass, C. D., Bergeron, D. E., Berish, D., Bowden, N. S., Brodsky, J. P., Bryan, C. D., Cherwinka, J. J., Classen, T., Conant, A. J., Cox, A. A., Davee, D., Dean, D., Deichert, G., Diwan, M. V., Dolinski, M. J., Erickson, A., Febbraro, M., Foust, B. T., Gaison, J. K., Galindo-Uribarri, A., Gilbert, C. E., Gilje, K. E., Hackett, B. T., Hans, S., Hansell, A. B., Heeger, K. M., Insler, J., Jaffe, D. E., Ji, X., Jones, D. C., Kyzylova, O., Lane, C. E., Langford, T. J., LaRosa, J., Littlejohn, B. R., Lu, X., Martinez Caicedo, D. A., Matta, J. T., McKeown, R. D., Mendenhall, M. P., Minock, J. M., Mueller, P. E., Mumm, H. P., Napolitano, J., Neilson, R., Nikkel, J. A., Norcini, D., Nour, S., Pushin, D. A., Qian, X., Romero-Romero, E., Rosero, R., Sarenac, D., Surukuchi, P. T., Telles, A. B., Tyra, M. A., Varner, R. L., Viren, B., White, C., Wilhelmi, J., Wise, T., Yeh, M., Yen, Y. -R., Zhang, A., Zhang, C., and Zhang, X. Measurement of the Antineutrino Spectrum from U235 Fission at HFIR with PROSPECT. United States: N. p., 2019. Web. doi:10.1103/PhysRevLett.122.251801.
Ashenfelter, J., Balantekin, A. B., Band, H. R., Bass, C. D., Bergeron, D. E., Berish, D., Bowden, N. S., Brodsky, J. P., Bryan, C. D., Cherwinka, J. J., Classen, T., Conant, A. J., Cox, A. A., Davee, D., Dean, D., Deichert, G., Diwan, M. V., Dolinski, M. J., Erickson, A., Febbraro, M., Foust, B. T., Gaison, J. K., Galindo-Uribarri, A., Gilbert, C. E., Gilje, K. E., Hackett, B. T., Hans, S., Hansell, A. B., Heeger, K. M., Insler, J., Jaffe, D. E., Ji, X., Jones, D. C., Kyzylova, O., Lane, C. E., Langford, T. J., LaRosa, J., Littlejohn, B. R., Lu, X., Martinez Caicedo, D. A., Matta, J. T., McKeown, R. D., Mendenhall, M. P., Minock, J. M., Mueller, P. E., Mumm, H. P., Napolitano, J., Neilson, R., Nikkel, J. A., Norcini, D., Nour, S., Pushin, D. A., Qian, X., Romero-Romero, E., Rosero, R., Sarenac, D., Surukuchi, P. T., Telles, A. B., Tyra, M. A., Varner, R. L., Viren, B., White, C., Wilhelmi, J., Wise, T., Yeh, M., Yen, Y. -R., Zhang, A., Zhang, C., & Zhang, X. Measurement of the Antineutrino Spectrum from U235 Fission at HFIR with PROSPECT. United States. doi:10.1103/PhysRevLett.122.251801.
Ashenfelter, J., Balantekin, A. B., Band, H. R., Bass, C. D., Bergeron, D. E., Berish, D., Bowden, N. S., Brodsky, J. P., Bryan, C. D., Cherwinka, J. J., Classen, T., Conant, A. J., Cox, A. A., Davee, D., Dean, D., Deichert, G., Diwan, M. V., Dolinski, M. J., Erickson, A., Febbraro, M., Foust, B. T., Gaison, J. K., Galindo-Uribarri, A., Gilbert, C. E., Gilje, K. E., Hackett, B. T., Hans, S., Hansell, A. B., Heeger, K. M., Insler, J., Jaffe, D. E., Ji, X., Jones, D. C., Kyzylova, O., Lane, C. E., Langford, T. J., LaRosa, J., Littlejohn, B. R., Lu, X., Martinez Caicedo, D. A., Matta, J. T., McKeown, R. D., Mendenhall, M. P., Minock, J. M., Mueller, P. E., Mumm, H. P., Napolitano, J., Neilson, R., Nikkel, J. A., Norcini, D., Nour, S., Pushin, D. A., Qian, X., Romero-Romero, E., Rosero, R., Sarenac, D., Surukuchi, P. T., Telles, A. B., Tyra, M. A., Varner, R. L., Viren, B., White, C., Wilhelmi, J., Wise, T., Yeh, M., Yen, Y. -R., Zhang, A., Zhang, C., and Zhang, X. Fri . "Measurement of the Antineutrino Spectrum from U235 Fission at HFIR with PROSPECT". United States. doi:10.1103/PhysRevLett.122.251801.
@article{osti_1542278,
title = {Measurement of the Antineutrino Spectrum from U235 Fission at HFIR with PROSPECT},
author = {Ashenfelter, J. and Balantekin, A. B. and Band, H. R. and Bass, C. D. and Bergeron, D. E. and Berish, D. and Bowden, N. S. and Brodsky, J. P. and Bryan, C. D. and Cherwinka, J. J. and Classen, T. and Conant, A. J. and Cox, A. A. and Davee, D. and Dean, D. and Deichert, G. and Diwan, M. V. and Dolinski, M. J. and Erickson, A. and Febbraro, M. and Foust, B. T. and Gaison, J. K. and Galindo-Uribarri, A. and Gilbert, C. E. and Gilje, K. E. and Hackett, B. T. and Hans, S. and Hansell, A. B. and Heeger, K. M. and Insler, J. and Jaffe, D. E. and Ji, X. and Jones, D. C. and Kyzylova, O. and Lane, C. E. and Langford, T. J. and LaRosa, J. and Littlejohn, B. R. and Lu, X. 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 Napolitano, J. and Neilson, R. and Nikkel, J. A. and Norcini, D. and Nour, S. and Pushin, D. A. and Qian, X. and Romero-Romero, E. and Rosero, R. and Sarenac, D. and Surukuchi, P. T. and Telles, A. B. and Tyra, M. A. and Varner, R. L. and Viren, B. and White, C. and Wilhelmi, J. and Wise, T. and Yeh, M. and Yen, Y. -R. and Zhang, A. and Zhang, C. and Zhang, X.},
abstractNote = {This Letter reports the first measurement of the 235U ν¯e energy spectrum by PROSPECT, the Precision Reactor Oscillation and Spectrum experiment, operating 7.9m from the 85MWth highly-enriched uranium (HEU) High Flux Isotope Reactor. With a surface-based, segmented detector, PROSPECT has observed 31678 ± 304 (stat.) ν¯e-induced inverse beta decays (IBD), the largest sample from HEU fission to date, 99% of which are attributed to 235U. Despite broad agreement, comparison of the Huber 235U model to the measured spectrum produces a χ 2 /ndf = 51.4/31, driven primarily by deviations in two localized energy regions. As a result, the measured 235U spectrum shape is consistent with a deviation relative to prediction equal in size to that observed at low-enriched uranium power reactors in the ν¯e energy region of 5-7MeV.},
doi = {10.1103/PhysRevLett.122.251801},
journal = {Physical Review Letters},
number = [25],
volume = [122],
place = {United States},
year = {2019},
month = {6}
}

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    Works referencing / citing this record:

    Detection of the Free Neutrino: a Confirmation
    journal, July 1956


    Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay
    journal, January 2017


    Review of Particle Physics
    journal, October 2016


    Investigating the spectral anomaly with different reactor antineutrino experiments
    journal, February 2017


    Experimental investigation of geologically produced antineutrinos with KamLAND
    journal, July 2005


    The PROSPECT reactor antineutrino experiment
    journal, April 2019

    • Ashenfelter, J.; Balantekin, A. B.; Baldenegro, C.
    • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 922
    • DOI: 10.1016/j.nima.2018.12.079

    Recent developments in Geant4
    journal, November 2016

    • Allison, J.; Amako, K.; Apostolakis, J.
    • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 835
    • DOI: 10.1016/j.nima.2016.06.125