Joint Determination of Reactor Antineutrino Spectra from U 235 and Pu 239 Fission by Daya Bay and PROSPECT

Journal Article · Mon Feb 21 23:00:00 EST 2022 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.128.081801· OSTI ID:1863889

An, F.  P.; Andriamirado, M.; Balantekin, A.  B.; Band, H.  R.; Bass, C.  D.; Bergeron, D.  E.; Berish, D.; Bishai, M.; Blyth, S.; Bowden, N.  S.; Bryan, C.  D.; Cao, G.  F.; Cao, J.; Chang, J.  F.; Chang, Y.; Chen, H.  S.; Chen, S.  M.; Chen, Y.; Chen, Y.  X.; Cheng, J. ; Cheng, Z.  K.; Cherwinka, J.  J.; Chu, M.  C.; Classen, T.; Conant, A.  J.; Cummings, J.  P.; Dalager, O.; Deichert, G.; Delgado, A.; Deng, F.  S.; Ding, Y.  Y.; Diwan, M.  V.; Dohnal, T.; Dolinski, M.  J.; Dolzhikov, D.; Dove, J.; Dvořák, M.; Dwyer, D.  A.; Erickson, A.; Foust, B.  T.; Gaison, J.  K.; Galindo-Uribarri, A.; Gallo, J.  P.; Gilbert, C.  E.; Gonchar, M.; Gong, G.  H.; Gong, H.; Grassi, M.; Gu, W.  Q.; Guo, J.  Y.; Guo, L.; Guo, X.  H.; Guo, Y.  H.; Guo, Z.; Hackenburg, R.  W.; Hans, S.; Hansell, A.  B.; He, M.; Heeger, K.  M.; Heffron, B.; Heng, Y.  K.; Hor, Y.  K.; Hsiung, Y.  B.; Hu, B.  Z.; Hu, J.  R.; Hu, T.; Hu, Z.  J.; Huang, H.  X.; Huang, J.  H.; Huang, X.  T.; Huang, Y.  B.; Huber, P.; Koblanski, J.; Jaffe, D.  E.; Jayakumar, S.; Jen, K.  L.; Ji, X.  L.; Ji, X.  P.; Johnson, R.  A.; Jones, D.  C.; Kang, L.; Kettell, S.  H.; Kohn, S.; Kramer, M.; Kyzylova, O.; Lane, C.  E.; Langford, T.  J.; LaRosa, J.; Lee, J.; Lee, J.  H. C.; Lei, R.  T.; Leitner, R.; Leung, J.  K. C.; Li, F.; Li, H.  L.; Li, J.  J.; Li, Q.  J.; Li, R.  H.; Li, S.; Li, S.  C.; Li, W.  D.; Li, X.  N.; Li, X.  Q.; Li, Y.  F.; Li, Z.  B.; Liang, H.; Lin, C.  J.; Lin, G.  L.; Lin, S.; Ling, J.  J.; Link, J.  M.; Littenberg, L.; Littlejohn, B.  R.; Liu, J.  C.; Liu, J.  L.; Liu, J.  X.; Lu, C.; Lu, H.  Q.; Lu, X.; Luk, K.  B.; Ma, B.  Z.; Ma, X.  B.; Ma, X.  Y.; Ma, Y.  Q.; Mandujano, R.  C.; Maricic, J.; Marshall, C.; McDonald, K.  T.; McKeown, R.  D.; Mendenhall, M.  P.; Meng, Y.; Meyer, A.  M.; Milincic, R.; Mueller, P.  E.; Mumm, H.  P.; Napolitano, J.; Naumov, D.; Naumova, E.; Neilson, R.; Nguyen, T.  M. T.; Nikkel, J.  A.; Nour, S.; Ochoa-Ricoux, J.  P.; Olshevskiy, A.; Palomino, J.  L.; Pan, H. -R.; Park, J.; Patton, S.; Peng, J.  C.; Pun, C.  S. J.; Pushin, D.  A.; Qi, F.  Z.; Qi, M.; Qian, X.; Raper, N.; Ren, J.; Morales Reveco, C.; Rosero, R.; Roskovec, B.; Ruan, X.  C.; Searles, M.; Steiner, H.; Sun, J.  L.; Surukuchi, P.  T.; Tmej, T.; Treskov, K.; Tse, W. -H.; Tull, C.  E.; Tyra, M.  A.; Varner, R.  L.; Venegas-Vargas, D.; Viren, B.; Vorobel, V.; Wang, C.  H.; Wang, J.; Wang, M.; Wang, N.  Y.; Wang, R.  G.; Wang, W.; Wang, W.; Wang, X.; Wang, Y.; Wang, Y.  F.; Wang, Z.; Wang, Z.; Wang, Z.  M.; Weatherly, P.  B.; Wei, H.  Y.; Wei, L.  H.; Wen, L.  J.; Whisnant, K.; White, C.; Wilhelmi, J.; Wong, H.  L. H.; Woolverton, A.; Worcester, E.; Wu, D.  R.; Wu, F.  L.; Wu, Q.; Wu, W.  J.; Xia, D.  M.; Xie, Z.  Q.; Xing, Z.  Z.; Xu, H.  K.; Xu, J.  L.; Xu, T.; Xue, T.; Yang, C.  G.; Yang, L.; Yang, Y.  Z.; Yao, H.  F.; Ye, M.; Yeh, M.; Young, B.  L.; Yu, H.  Z.; Yu, Z.  Y.; Yue, B.  B.; Zavadskyi, V.; Zeng, S.; Zeng, Y.; Zhan, L.; Zhang, C.; Zhang, F.  Y.; Zhang, H.  H.; Zhang, J.  W.; Zhang, Q.  M.; Zhang, S.  Q.; Zhang, X.; Zhang, X.  T.; Zhang, Y.  M.; Zhang, Y.  X.; Zhang, Y.  Y.; Zhang, Z.  J.; Zhang, Z.  P.; Zhang, Z.  Y.; Zhao, J.; Zhao, R.  Z.; Zhou, L.; Zhuang, H.  L.; Zou, J.  H.

A joint determination of the reactor antineutrino spectra resulting from the fission of 235U and 239Pu has been carried out by the Daya Bay and PROSPECT collaborations. This Letter reports the level of consistency of 235U spectrum measurements from the two experiments and presents new results from a joint analysis of both data sets. The measurements are found to be consistent. The combined analysis reduces the degeneracy between the dominant 235U and 239Pu isotopes and improves the uncertainty of the 235U spectral shape to about 3%. The 235U and 239Pu antineutrino energy spectra are unfolded from the jointly deconvolved reactor spectra using the Wiener-SVD unfolding method, providing a data-based reference for other reactor antineutrino experiments and other applications. This is the first measurement of the 235U and 239Pu spectra based on the combination of experiments at low- and highly enriched uranium reactors.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: ABB Inc., Västerås (Sweden)
• Contributing Organization: Daya Bay Collaboration; PROSPECT Collaboration
• Grant/Contract Number: SC0012704
• OSTI ID: 1863889
• Alternate ID(s): OSTI ID: 1864943; OSTI ID: 1890312; OSTI ID: 1958286
• Report Number(s): BNL-222918-2022-JAAM
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 128; ISSN 0031-9007
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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