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. Chu; A. 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

doi:10.1103/PhysRevD.100.052004

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

Institute of Physics

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

38 Scopus citations

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 language	English
Article number	052004
Journal	Physical Review D
Volume	100
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.100.052004
State	Published - 9 Sep 2019

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10.1103/PhysRevD.100.052004

Cite this

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), Article 052004. https://doi.org/10.1103/PhysRevD.100.052004

@article{1089171a3e2541b78e7a2f531b5fb02f,

title = "Improved measurement of the reactor antineutrino flux at Daya Bay",

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.",

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

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

year = "2019",

month = sep,

day = "9",

doi = "10.1103/PhysRevD.100.052004",

language = "English",

volume = "100",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "5",

}

Adey, D, An, FP, Balantekin, AB, Band, HR, Bishai, M, Blyth, S, Cao, D, Cao, GF, Cao, J, Chan, YL, Chang, JF, Chang, Y, Chen, HS, Chen, SM, Chen, Y, Chen, YX, Cheng, J, Cheng, ZK, Cherwinka, JJ, Chu, MC, Chukanov, A, Cummings, JP, Deng, FS, Ding, YY, Diwan, MV, Dolgareva, M, Dove, J, Dwyer, DA, Edwards, WR, Gonchar, M, Gong, GH, Gong, H, Gu, WQ, Guo, L, Guo, XH, Guo, YH, Guo, Z, Hackenburg, RW, Hans, S, He, M, Heeger, KM, Heng, YK, Higuera, A, Hsiung, YB, Hu, BZ, Hu, T, Hu, ZJ, Huang, HX, Huang, XT, Huang, YB, Huber, P, Huo, W, Hussain, G, Jaffe, DE, Jen, KL, Ji, XL, Ji, XP, Johnson, RA, Jones, D, Kang, L, Kettell, SH, Koerner, LW, Kohn, S, Kramer, M, Langford, TJ, Lebanowski, L, Lee, J, Lee, JHC, Lei, RT, Leitner, R, Leung, JKC, Li, C, Li, F, Li, HL, Li, QJ, Li, S, Li, SC, Li, SJ, Li, WD, Li, XN, Li, XQ, Li, YF, Li, ZB, Liang, H, Lin, CJ, Lin, GL, Lin, S, Lin, SK, Lin, YC, Ling, JJ, Link, JM, Littenberg, L, Littlejohn, BR, Liu, JC, Liu, JL, Liu, Y, Liu, YH, Loh, CW, Lu, C, Lu, HQ, Lu, JS, Luk, KB, Ma, XB, Ma, XY, Ma, YQ, Malyshkin, Y, Marshall, C, Martinez Caicedo, DA, McDonald, KT, McKeown, RD, Mitchell, I, Mora Lepin, L, Napolitano, J, Naumov, D, Naumova, E, Ochoa-Ricoux, JP, Olshevskiy, A, Pan, HR, Park, J, Patton, S, Pec, V, Peng, JC, Pinsky, L, Pun, CSJ, Qi, FZ, Qi, M, Qian, X, Qiu, RM, Raper, N, Ren, J, Rosero, R, Roskovec, B, Ruan, XC, Steiner, H, Sun, JL, Treskov, K, Tse, WH, Tull, CE, Viren, B, Vorobel, V, Wang, CH, Wang, J, Wang, M, Wang, NY, Wang, RG, Wang, W, Wang, W, Wang, X, Wang, YF, Wang, Z, Wang, Z, Wang, ZM, Wei, HY, Wei, LH, Wen, LJ, Whisnant, K, White, CG, Wise, T, Wong, HLH, Wong, SCF, Worcester, E, Wu, Q, Wu, WJ, Xia, DM, Xing, ZZ, Xu, JL, Xue, T, Yang, CG, Yang, H, Yang, L, Yang, MS, Yang, MT, Yang, YZ, Ye, M, Yeh, M, Young, BL, Yu, HZ, Yu, ZY, Yue, BB, Zeng, S, Zhan, L, Zhang, C, Zhang, CC, Zhang, FY, Zhang, HH, Zhang, JW, Zhang, QM, Zhang, R, Zhang, XF, Zhang, XT, Zhang, YM, Zhang, YM, Zhang, YX, Zhang, YY, Zhang, ZJ, Zhang, ZP, Zhang, ZY, Zhao, J, Zheng, P, Zhou, L, Zhuang, HL & Zou, JH 2019, 'Improved measurement of the reactor antineutrino flux at Daya Bay', Physical Review D, vol. 100, no. 5, 052004. https://doi.org/10.1103/PhysRevD.100.052004

TY - JOUR

T1 - Improved measurement of the reactor antineutrino flux at Daya Bay

AU - Adey, D.

AU - An, F. P.

AU - Balantekin, A. B.

AU - Band, H. R.

AU - Bishai, M.

AU - Blyth, S.

AU - Cao, D.

AU - Cao, G. F.

AU - Cao, J.

AU - Chan, Y. L.

AU - Chang, J. F.

AU - Chang, Y.

AU - Chen, H. S.

AU - Chen, S. M.

AU - Chen, Y.

AU - Chen, Y. X.

AU - Cheng, J.

AU - Cheng, Z. K.

AU - Cherwinka, J. J.

AU - Chu, M. C.

AU - Chukanov, A.

AU - Cummings, J. P.

AU - Deng, F. S.

AU - Ding, Y. Y.

AU - Diwan, M. V.

AU - Dolgareva, M.

AU - Dove, J.

AU - Dwyer, D. A.

AU - Edwards, W. R.

AU - Gonchar, M.

AU - Gong, G. H.

AU - Gong, H.

AU - Gu, W. Q.

AU - Guo, L.

AU - Guo, X. H.

AU - Guo, Y. H.

AU - Guo, Z.

AU - Hackenburg, R. W.

AU - Hans, S.

AU - He, M.

AU - Heeger, K. M.

AU - Heng, Y. K.

AU - Higuera, A.

AU - Hsiung, Y. B.

AU - Hu, B. Z.

AU - Hu, T.

AU - Hu, Z. J.

AU - Huang, H. X.

AU - Huang, X. T.

AU - Huang, Y. B.

AU - Huber, P.

AU - Huo, W.

AU - Hussain, G.

AU - Jaffe, D. E.

AU - Jen, K. L.

AU - Ji, X. L.

AU - Ji, X. P.

AU - Johnson, R. A.

AU - Jones, D.

AU - Kang, L.

AU - Kettell, S. H.

AU - Koerner, L. W.

AU - Kohn, S.

AU - Kramer, M.

AU - Langford, T. J.

AU - Lebanowski, L.

AU - Lee, J.

AU - Lee, J. H.C.

AU - Lei, R. T.

AU - Leitner, R.

AU - Leung, J. K.C.

AU - Li, C.

AU - Li, F.

AU - Li, H. L.

AU - Li, Q. J.

AU - Li, S.

AU - Li, S. C.

AU - Li, S. J.

AU - Li, W. D.

AU - Li, X. N.

AU - Li, X. Q.

AU - Li, Y. F.

AU - Li, Z. B.

AU - Liang, H.

AU - Lin, C. J.

AU - Lin, G. L.

AU - Lin, S.

AU - Lin, S. K.

AU - Lin, Y. C.

AU - Ling, J. J.

AU - Link, J. M.

AU - Littenberg, L.

AU - Littlejohn, B. R.

AU - Liu, J. C.

AU - Liu, J. L.

AU - Liu, Y.

AU - Liu, Y. H.

AU - Loh, C. W.

AU - Lu, C.

AU - Lu, H. Q.

AU - Lu, J. S.

AU - Luk, K. B.

AU - Ma, X. B.

AU - Ma, X. Y.

AU - Ma, Y. Q.

AU - Malyshkin, Y.

AU - Marshall, C.

AU - Martinez Caicedo, D. A.

AU - McDonald, K. T.

AU - McKeown, R. D.

AU - Mitchell, I.

AU - Mora Lepin, L.

AU - Napolitano, J.

AU - Naumov, D.

AU - Naumova, E.

AU - Ochoa-Ricoux, J. P.

AU - Olshevskiy, A.

AU - Pan, H. R.

AU - Park, J.

AU - Patton, S.

AU - Pec, V.

AU - Peng, J. C.

AU - Pinsky, L.

AU - Pun, C. S.J.

AU - Qi, F. Z.

AU - Qi, M.

AU - Qian, X.

AU - Qiu, R. M.

AU - Raper, N.

AU - Ren, J.

AU - Rosero, R.

AU - Roskovec, B.

AU - Ruan, X. C.

AU - Steiner, H.

AU - Sun, J. L.

AU - Treskov, K.

AU - Tse, W. H.

AU - Tull, C. E.

AU - Viren, B.

AU - Vorobel, V.

AU - Wang, C. H.

AU - Wang, J.

AU - Wang, M.

AU - Wang, N. Y.

AU - Wang, R. G.

AU - Wang, W.

AU - Wang, X.

AU - Wang, Y. F.

AU - Wang, Z.

AU - Wang, Z. M.

AU - Wei, H. Y.

AU - Wei, L. H.

AU - Wen, L. J.

AU - Whisnant, K.

AU - White, C. G.

AU - Wise, T.

AU - Wong, H. L.H.

AU - Wong, S. C.F.

AU - Worcester, E.

AU - Wu, Q.

AU - Wu, W. J.

AU - Xia, D. M.

AU - Xing, Z. Z.

AU - Xu, J. L.

AU - Xue, T.

AU - Yang, C. G.

AU - Yang, H.

AU - Yang, L.

AU - Yang, M. S.

AU - Yang, M. T.

AU - Yang, Y. Z.

AU - Ye, M.

AU - Yeh, M.

AU - Young, B. L.

AU - Yu, H. Z.

AU - Yu, Z. Y.

AU - Yue, B. B.

AU - Zeng, S.

AU - Zhan, L.

AU - Zhang, C.

AU - Zhang, C. C.

AU - Zhang, F. Y.

AU - Zhang, H. H.

AU - Zhang, J. W.

AU - Zhang, Q. M.

AU - Zhang, R.

AU - Zhang, X. F.

AU - Zhang, X. T.

AU - Zhang, Y. M.

AU - Zhang, Y. X.

AU - Zhang, Y. Y.

AU - Zhang, Z. J.

AU - Zhang, Z. P.

AU - Zhang, Z. Y.

AU - Zhao, J.

AU - Zheng, P.

AU - Zhou, L.

AU - Zhuang, H. L.

AU - Zou, J. H.

PY - 2019/9/9

Y1 - 2019/9/9

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85072910710&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.100.052004

DO - 10.1103/PhysRevD.100.052004

M3 - Article

AN - SCOPUS:85072910710

SN - 2470-0010

VL - 100

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 052004

ER -

Improved measurement of the reactor antineutrino flux at Daya Bay

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