文献类型：期刊文献

英文题名：Extraction of the U 235 and Pu 239 antineutrino spectra 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]; Cao, D.[7]; Cao, G.F.[1]; Cao, J.[1]; Chang, J.F.[1]; Chang, Y.[8]; Chen, H.S.[1]; Chen, S.M.[9]; Chen, Y.[10,11]; Chen, Y.X.[12]; Cheng, J.[1]; Cheng, Z.K.[11]; Cherwinka, J.J.[3]; Chu, M.C.[13]; Chukanov, A.[14]; Cummings, J.P.[15]; Dash, N.[1]; Deng, F.S.[16]; Ding, Y.Y.[1]; Diwan, M.V.[5]; Dohnal, T.[17]; Dove, J.[18]; Dvo?ák, M.[17]; Dwyer, D.A.[19]; Gonchar, M.[14]; Gong, G.H.[9]; Gong, H.[9]; Gu, W.Q.[5]; Guo, J.Y.[11]; Guo, L.[9]; Guo, X.H.[20]; Guo, Y.H.[21]; Guo, Z.[9]; Hackenburg, R.W.[5]; Hans, S.[5]; He, M.[1]; Heeger, K.M.[4]; Heng, Y.K.[1]; Higuera, A.[22]; Hor, Y.K.[11]; Hsiung, Y.B.[6]; Hu, B.Z.[6]; Hu, J.R.[1]; Hu, T.[1]; Hu, Z.J.[11]; Huang, H.X.[23]; Huang, X.T.[24]; Huang, Y.B.[1]; Huber, P.[25]; Jaffe, D.E.[5]; Jen, K.L.[26]; Ji, X.L.[1]; Ji, X.P.[5]; Johnson, R.A.[27]; Jones, D.[28]; Kang, L.[29]; Kettell, S.H.[5]; Koerner, L.W.[22]; Kohn, S.[30]; Kramer, M.[19,30]; Langford, T.J.[4]; Lee, J.H.C.[19,31]; Lei, R.T.[29]; Leitner, R.[17]; Leung, J.K.C.[31]; Li, C.[24]; Li, F.[1]; Li, H.L.[1]; Li, Q.J.[1]; Li, S.[29]; Li, S.C.[25]; Li, S.J.[11]; Li, W.D.[1]; Li, X.N.[1]; Li, X.Q.[32]; Li, Y.F.[1]; Li, Z.B.[11]; Liang, H.[16]; Lin, C.J.[19]; Lin, G.L.[26]; Lin, S.[29]; Ling, J.J.[11]; Link, J.M.[25]; Littenberg, L.[5]; Littlejohn, B.R.[33]; Liu, J.C.[1]; Liu, J.L.[34]; Liu, Y.[24]; Liu, Y.H.[7]; Lu, C.[35]; Lu, H.Q.[1]; Lu, J.S.[1]; Luk, K.B.[19,30]; Ma, X.B.[12]; Ma, X.Y.[1]; Ma, Y.Q.[1]; Marshall, C.[19]; Martinez Caicedo, D.A.[33]; McDonald, K.T.[35]; McKeown, R.D.[36,37]; Mitchell, I.[22]; Mora Lepin, L.[38]; Napolitano, J.[28]; Naumov, D.[14]; Naumova, E.[14]; Ochoa-Ricoux, J.P.[38,39]; Olshevskiy, A.[14]; Pan, H.-R.[6]; Park, J.[25]; Patton, S.[19]; Pec, V.[17]; Peng, J.C.[18]; Pinsky, L.[22]; Pun, C.S.J.[31]; Qi, F.Z.[1]; Qi, M.[7]; Qian, X.[5]; Raper, N.[11]; Ren, J.[23]; Rosero, R.[5]; Roskovec, B.[39]; Ruan, X.C.[23]; Steiner, H.[19,30]; Sun, J.L.[40]; Treskov, K.[14]; Tse, W.-H.[13]; Tull, C.E.[19]; Viren, B.[5]; Vorobel, V.[17]; Wang, C.H.[8]; Wang, J.[11]; Wang, M.[24]; Wang, N.Y.[20]; Wang, R.G.[1]; Wang, W.[11,37]; Wang, W.[7]; Wang, X.[41]; Wang, Y.[7]; Wang, Y.F.[1]; Wang, Z.[1]; Wang, Z.[9]; Wang, Z.M.[1]; Wei, H.Y.[5]; Wei, L.H.[1]; Wen, L.J.[1]; Whisnant, K.[42]; White, C.G.[33]; Wong, H.L.H.[19,30]; Wong, S.C.F.[11]; Worcester, E.[5]; Wu, Q.[24]; Wu, W.J.[1]; Xia, D.M.[43]; Xing, Z.Z.[1]; Xu, J.L.[1]; Xue, T.[9]; Yang, C.G.[1]; Yang, L.[29]; Yang, M.S.[1]; Yang, Y.Z.[9]; Ye, M.[1]; Yeh, M.[5]; Young, B.L.[42]; Yu, H.Z.[11]; Yu, Z.Y.[1]; Yue, B.B.[11]; Zeng, S.[1]

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] Nanjing University, Nanjing, China; [8] National United University, Miao-Li, Taiwan; [9] Department of Engineering Physics, Tsinghua University, Beijing, China; [10] Shenzhen University, Shenzhen, China; [11] Sun Yat-Sen [Zhongshan] University, Guangzhou, China; [12] North China Electric Power University, Beijing, China; [13] Chinese University of Hong Kong, Hong Kong; [14] Joint Institute for Nuclear Research, Dubna, Moscow Region, Russia; [15] Siena College, Loudonville, NY, 12211, United States; [16] University of Science and Technology of China, Hefei, China; [17] Charles University, Faculty of Mathematics and Physics, Prague, Czech Republic; [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] Shandong University, Jinan, China; [25] Center for Neutrino Physics, Virginia Tech, Blacksburg, VA, 24061, United States; [26] Institute of Physics, National Chiao-Tung University, Hsinchu, Taiwan; [27] Department of Physics, University of Cincinnati, Cincinnati, OH, 45221, United States; [28] Department of Physics, College of Science and Technology, Temple University, Philadelphia, PA, 19122, United States; [29] Dongguan University of Technology, Dongguan, China; [30] Department of Physics, University of California, Berkeley, CA, 94720, United States; [31] Department of Physics, University of Hong Kong, Pokfulam, Hong Kong; [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] California Institute of Technology, Pasadena, CA, 91125, United States; [37] College of William and Mary, Williamsburg, VA, 23187, United States; [38] Instituto de Física, Pontificia Universidad Católica de Chile, Santiago, Chile; [39] Department of Physics and Astronomy, University of California, Irvine, CA, 92697, United States; [40] China General Nuclear Power Group, Shenzhen, China; [41] College of Electronic Science and Engineering, National University of Defense Technology, Changsha, China; [42] Iowa State University, Ames, IA, 50011, United States; [43] Chongqing University, Chongqing, China

年份：2019

卷号：123

期号：11

外文期刊名：Physical Review Letters

收录：EI(收录号：20194007487085)

语种：英文

外文关键词：Extraction - Forecasting - Spectroscopy

摘要：This Letter reports the first extraction of individual antineutrino spectra from U235 and Pu239 fission and an improved measurement of the prompt energy spectrum of reactor antineutrinos at Daya Bay. The analysis uses 3.5×106 inverse beta-decay candidates in four near antineutrino detectors in 1958 days. The individual antineutrino spectra of the two dominant isotopes, U235 and Pu239, are extracted using the evolution of the prompt spectrum as a function of the isotope fission fractions. In the energy window of 4-6 MeV, a 7% (9%) excess of events is observed for the U235 (Pu239) spectrum compared with the normalized Huber-Mueller model prediction. The significance of discrepancy is 4.0σ for U235 spectral shape compared with the Huber-Mueller model prediction. The shape of the measured inverse beta-decay prompt energy spectrum disagrees with the prediction of the Huber-Mueller model at 5.3σ. In the energy range of 4-6 MeV, a maximal local discrepancy of 6.3σ is observed. ? 2019 authors. Published by the American Physical Society.