文献类型：期刊文献

英文题名：Improved measurement of the reactor antineutrino flux at Daya Bay

作者：Adey, D.[1]; An, F.P.[2]; Balantekin, A.B.[3]; Band, H.R.[4]; Bishai, M.[5]; Blyth, S.[6,7]; Cao, D.[8]; Cao, G.F.[1]; Cao, J.[1]; Chan, Y.L.[9]; Chang, J.F.[1]; Chang, Y.[7]; Chen, H.S.[1]; Chen, S.M.[10]; Chen, Y.[11]; Chen, Y.X.[12]; Cheng, J.[13]; Cheng, Z.K.[14]; Cherwinka, J.J.[3]; Chu, M.C.[9]; Chukanov, A.[15]; Cummings, J.P.[16]; Deng, F.S.[17]; Ding, Y.Y.[1]; Diwan, M.V.[5]; Dolgareva, M.[15]; Dove, J.[18]; Dwyer, D.A.[19]; Edwards, W.R.[19]; Gonchar, M.[15]; Gong, G.H.[10]; Gong, H.[10]; Gu, W.Q.[5]; Guo, L.[10]; Guo, X.H.[20]; Guo, Y.H.[21]; Guo, Z.[10]; Hackenburg, R.W.[5]; Hans, S.[5]; He, M.[1]; Heeger, K.M.[4]; Heng, Y.K.[1]; Higuera, A.[22]; Hsiung, Y.B.[6]; Hu, B.Z.[6]; Hu, T.[1]; Hu, Z.J.[14]; Huang, H.X.[23]; Huang, X.T.[13]; Huang, Y.B.[1]; Huber, P.[24]; Huo, W.[17]; Hussain, G.[10]; Jaffe, D.E.[5]; Jen, K.L.[25]; Ji, X.L.[1]; Ji, X.P.[5]; Johnson, R.A.[26]; Jones, D.[27]; Kang, L.[28]; Kettell, S.H.[5]; Koerner, L.W.[22]; Kohn, S.[29]; Kramer, M.[19,29]; Langford, T.J.[4]; Lebanowski, L.[10]; Lee, J.[19]; Lee, J.H.C.[30]; Lei, R.T.[28]; Leitner, R.[31]; Leung, J.K.C.[30]; Li, C.[13]; Li, F.[1]; Li, H.L.[13]; Li, Q.J.[1]; Li, S.[28]; Li, S.C.[24]; Li, S.J.[14]; Li, W.D.[1]; Li, X.N.[1]; Li, X.Q.[32]; Li, Y.F.[1]; Li, Z.B.[14]; Liang, H.[17]; Lin, C.J.[19]; Lin, G.L.[25]; Lin, S.[28]; Lin, S.K.[22]; Lin, Y.-C.[6]; Ling, J.J.[14]; Link, J.M.[24]; Littenberg, L.[5]; Littlejohn, B.R.[33]; Liu, J.C.[1]; Liu, J.L.[34]; Liu, Y.[13]; Liu, Y.H.[8]; Loh, C.W.[8]; Lu, C.[35]; Lu, H.Q.[1]; Lu, J.S.[1]; Luk, K.B.[19,29]; Ma, X.B.[12]; Ma, X.Y.[1]; Ma, Y.Q.[1]; Malyshkin, Y.[36]; Marshall, C.[19]; Caicedo, D.A. Martinez[33]; McDonald, K.T.[35]; McKeown, R.D.[37,38]; Mitchell, I.[22]; Lepin, L. Mora[36]; Napolitano, J.[27]; Naumov, D.[15]; Naumova, E.[15]; Ochoa-Ricoux, J.P.[36]; Olshevskiy, A.[15]; Pan, H.-R.[6]; Park, J.[24]; Patton, S.[19]; Pec, V.[31]; Peng, J.C.[18]; Pinsky, L.[22]; Pun, C.S.J.[30]; Qi, F.Z.[1]; Qi, M.[8]; Qian, X.[5]; Qiu, R.M.[12]; Raper, N.[14]; Ren, J.[23]; Rosero, R.[5]; Roskovec, B.[36]; Ruan, X.C.[23]; Steiner, H.[19,29]; Sun, J.L.[39]; Treskov, K.[15]; Tse, W.-H.[9]; Tull, C.E.[19]; Viren, B.[5]; Vorobel, V.[31]; Wang, C.H.[7]; Wang, J.[14]; Wang, M.[13]; Wang, N.Y.[20]; Wang, R.G.[1]; Wang, W.[14,38]; Wang, W.[8]; Wang, X.[40]; Wang, Y.F.[1]; Wang, Z.[1]; Wang, Z.[10]; Wang, Z.M.[1]; Wei, H.Y.[5]; Wei, L.H.[1]; Wen, L.J.[1]; Whisnant, K.[41]; White, C.G.[33]; Wise, T.[4]; Wong, H.L.H.[19,29]; Wong, S.C.F.[14]; Worcester, E.[5]; Wu, Q.[13]; Wu, W.J.[1]; Xia, D.M.[42]; Xing, Z.Z.[1]; Xu, J.L.[1]; Xue, T.[10]; Yang, C.G.[1]; Yang, H.[8]; Yang, L.[28]; Yang, M.S.[1]; Yang, M.T.[13]

机构：[1] Institute of High Energy Physics, Beijing, China; [2] Institute of Modern Physics, East China University of Science and Technology, Shanghai, China; [3] University of Wisconsin, Madison, WI, 53706, United States; [4] Wright Laboratory and Department of Physics, Yale University, New Haven, CT, 06520, United States; [5] Brookhaven National Laboratory, Upton, NY, 11973, United States; [6] Department of Physics, National Taiwan University, Taipei, Taiwan; [7] National United University, Miao-Li, Taiwan; [8] Nanjing University, Nanjing, China; [9] Chinese University of Hong Kong, Hong Kong; [10] Department of Engineering Physics, Tsinghua University, Beijing, China; [11] Shenzhen University, Shenzhen, China; [12] North China Electric Power University, Beijing, China; [13] Shandong University, Jinan, China; [14] Sun Yat-Sen [Zhongshan] University, Guangzhou, China; [15] Joint Institute for Nuclear Research, Dubna, Moscow Region; [16] Siena College, Loudonville, NY, 12211, United States; [17] University of Science and Technology of China, Hefei, China; [18] Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States; [19] Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, United States; [20] Beijing Normal University, Beijing, China; [21] Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, China; [22] Department of Physics, University of Houston, Houston, TX, 77204, United States; [23] China Institute of Atomic Energy, Beijing, China; [24] Center for Neutrino Physics, Virginia Tech, Blacksburg, VA, 24061, United States; [25] Institute of Physics, National Chiao-Tung University, Hsinchu, Taiwan; [26] Department of Physics, University of Cincinnati, Cincinnati, OH, 45221, United States; [27] Department of Physics, College of Science and Technology, Temple University, Philadelphia, PA, 19122, United States; [28] Dongguan University of Technology, Dongguan, China; [29] Department of Physics, University of California, Berkeley, CA, 94720, United States; [30] Department of Physics, University of Hong Kong, Pokfulam, Hong Kong; [31] Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic; [32] School of Physics, Nankai University, Tianjin, China; [33] Department of Physics, Illinois Institute of Technology, Chicago, IL, 60616, United States; [34] Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai, China; [35] Joseph Henry Laboratories, Princeton University, Princeton, NJ, 08544, United States; [36] Instituto de Física, Pontificia Universidad Católica de Chile, Santiago, Chile; [37] California Institute of Technology, Pasadena, CA, 91125, United States; [38] College of William and Mary, Williamsburg, VA, 23187, United States; [39] China General Nuclear Power Group, Shenzhen; [40] College of Electronic Science and Engineering, National University of Defense Technology, Changsha; [41] Iowa State University, Ames, IA, 50011, United States; [42] Chongqing University, Chongqing, China

年份：2018

外文期刊名：arXiv

收录：EI(收录号：20200530388)

语种：英文

摘要：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 235U, 238U, 239Pu, and 241Pu 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. Copyright ? 2018, The Authors. All rights reserved.