Improved measurement of the reactor antineutrino flux at Daya Bay

D. Adey, F. P. An, A. B. Balantekin, H. R. Band, M. Bishai, S. Blyth, D. Cao, G. F. Cao, J. Cao, Y. L. Chan, J. F. Chang, Y. Chang, H. S. Chen, S. M. Chen, Y. Chen, Y. X. Chen, J. Cheng, Z. K. Cheng, J. J. Cherwinka, M. C. ChuA. Chukanov, J. P. Cummings, F. S. Deng, Y. Y. Ding, M. V. Diwan, M. Dolgareva, J. Dove, D. A. Dwyer, W. R. Edwards, M. Gonchar, G. H. Gong, H. Gong, W. Q. Gu, L. Guo, X. H. Guo, Y. H. Guo, Z. Guo, R. W. Hackenburg, S. Hans, M. He, K. M. Heeger, Y. K. Heng, A. Higuera, Y. B. Hsiung, B. Z. Hu, T. Hu, Z. J. Hu, H. X. Huang, X. T. Huang, Y. B. Huang, P. Huber, W. Huo, G. Hussain, D. E. Jaffe, K. L. Jen, X. L. Ji, X. P. Ji, R. A. Johnson, D. Jones, L. Kang, S. H. Kettell, L. W. Koerner, S. Kohn, M. Kramer, T. J. Langford, L. Lebanowski, J. Lee, J. H.C. Lee, R. T. Lei, R. Leitner, J. K.C. Leung, C. Li, F. Li, H. L. Li, Q. J. Li, S. Li, S. C. Li, S. J. Li, W. D. Li, X. N. Li, X. Q. Li, Y. F. Li, Z. B. Li, H. Liang, C. J. Lin, G. L. Lin, S. Lin, S. K. Lin, Y. C. Lin, J. J. Ling, J. M. Link, L. Littenberg, B. R. Littlejohn, J. C. Liu, J. L. Liu, Y. Liu, Y. H. Liu, C. W. Loh, C. Lu, H. Q. Lu, J. S. Lu, K. B. Luk, X. B. Ma, X. Y. Ma, Y. Q. Ma, Y. Malyshkin, C. Marshall, D. A. Martinez Caicedo, K. T. McDonald, R. D. McKeown, I. Mitchell, L. Mora Lepin, J. Napolitano, D. Naumov, E. Naumova, J. P. Ochoa-Ricoux, A. Olshevskiy, H. R. Pan, J. Park, S. Patton, V. Pec, J. C. Peng, L. Pinsky, C. S.J. Pun, F. Z. Qi, M. Qi, X. Qian, R. M. Qiu, N. Raper, J. Ren, R. Rosero, B. Roskovec, X. C. Ruan, H. Steiner, J. L. Sun, K. Treskov, W. H. Tse, C. E. Tull, B. Viren, V. Vorobel, C. H. Wang, J. Wang, M. Wang, N. Y. Wang, R. G. Wang, W. Wang, W. Wang, X. Wang, Y. F. Wang, Z. Wang, Z. Wang, Z. M. Wang, H. Y. Wei, L. H. Wei, L. J. Wen, K. Whisnant, C. G. White, T. Wise, H. L.H. Wong, S. C.F. Wong, E. Worcester, Q. Wu, W. J. Wu, D. M. Xia, Z. Z. Xing, J. L. Xu, T. Xue, C. G. Yang, H. Yang, L. Yang, M. S. Yang, M. T. Yang, Y. Z. Yang, M. Ye, M. Yeh, B. L. Young, H. Z. Yu, Z. Y. Yu, B. B. Yue, S. Zeng, L. Zhan, C. Zhang, C. C. Zhang, F. Y. Zhang, H. H. Zhang, J. W. Zhang, Q. M. Zhang, R. Zhang, X. F. Zhang, X. T. Zhang, Y. M. Zhang, Y. M. Zhang, Y. X. Zhang, Y. Y. Zhang, Z. J. Zhang, Z. P. Zhang, Z. Y. Zhang, J. Zhao, P. Zheng, L. Zhou, H. L. Zhuang, J. H. Zou

Research output: Contribution to journalArticle

Abstract

This work reports a precise measurement of the reactor antineutrino flux using 2.2 million inverse beta decay (IBD) events collected with the Daya Bay near detectors in 1230 days. The dominant uncertainty on the neutron detection efficiency is reduced by 56% with respect to the previous measurement through a comprehensive neutron calibration and detailed data and simulation analysis. The new average IBD yield is determined to be (5.91±0.09)×10-43 cm2/fission with total uncertainty improved by 29%. The corresponding mean fission fractions from the four main fission isotopes U235, U238, Pu239, and Pu241 are 0.564, 0.076, 0.304, and 0.056, respectively. The ratio of measured to predicted antineutrino yield is found to be 0.952±0.014±0.023 (1.001±0.015±0.027) for the Huber-Mueller (ILL-Vogel) model, where the first and second uncertainty are experimental and theoretical model uncertainty, respectively. This measurement confirms the discrepancy between the world average of reactor antineutrino flux and the Huber-Mueller model.

Original languageEnglish (US)
Article number052004
JournalPhysical Review D
Volume100
Issue number5
DOIs
StatePublished - Sep 9 2019

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Adey, D., An, F. P., Balantekin, A. B., Band, H. R., Bishai, M., Blyth, S., Cao, D., Cao, G. F., Cao, J., Chan, Y. L., Chang, J. F., Chang, Y., Chen, H. S., Chen, S. M., Chen, Y., Chen, Y. X., Cheng, J., Cheng, Z. K., Cherwinka, J. J., ... Zou, J. H. (2019). Improved measurement of the reactor antineutrino flux at Daya Bay. Physical Review D, 100(5), [052004]. https://doi.org/10.1103/PhysRevD.100.052004