Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay Supported in part by the Ministry of Science and Technology of China, the United States Department of Energy, the Chinese Academy of Sciences, the CAS Center for Excellence in Particle Physics, the National Natural Science Foundation of China, the Guangdong provincial government, the Shenzhen municipal government, the China General Nuclear Power Group, the Research Grants Council of the Hong Kong Special Administrative Region of
作者: F. P. AnA. B. BalantekinH. R. BandM. BishaiS. BlythD. CaoG. F. CaoJ. CaoW. R. CenY. L. ChanJ. F. ChangL. C. ChangY. ChangH. S. ChenQ. Y. ChenS. M. ChenY. X. ChenY. ChenJ.-H. ChengJ. ChengY. P. ChengZ. K. ChengJ. J. CherwinkaM. C. ChuA. ChukanovJ. P. CummingsJ. de ArcosZ. Y. DengX. F. DingY. Y. DingM. V. DiwanM. DolgarevaJ. DoveD. A. DwyerW. R. EdwardsR. GillM. GoncharG. H. GongH. GongM. GrassiW. Q. GuM. Y. GuanL. GuoR. P.
作者单位: 1Institute of Modern Physics, East China University of Science and Technology, Shanghai
2University of Wisconsin, Madison, Wisconsin 53706
3Department of Physics, Yale University, New Haven, Connecticut 06520
4Brookhaven National Laboratory, Upton, New York 11973
5Department of Physics, National Taiwan University, Taipei
6National United University, Miao-Li
7Nanjing University, Nanjing
8Institute of High Energy Physics, Beijing
9Chinese University of Hong Kong, Hong Kong
10Institute of Physics, National Chiao-Tung University, Hsinchu
11Shandong University, Jinan
12Department of Engineering Physics, Tsinghua University, Beijing
13North China Electric Power University, Beijing
14Shenzhen University, Shenzhen
15Sun Yat-Sen (Zhongshan) University, Guangzhou
16Joint Institute for Nuclear Research, Dubna, Moscow Region
17Siena College, Loudonville, New York 12211
18Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616
19Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
20Lawrence Berkeley National Laboratory, Berkeley, California 94720
21Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai
22Beijing Normal University, Beijing
23Department of Physics, University of Houston, Houston, Texas 77204
24Center for Neutrino Physics, Virginia Tech, Blacksburg, Virginia 24061
25China Institute of Atomic Energy, Beijing
26University of Science and Technology of China, Hefei
27School of Physics, Nankai University, Tianjin
28Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221
29Department of Physics, College of Science and Technology, Temple University, Philadelphia, Pennsylvania 19122
30Dongguan University of Technology, Dongguan
31Department of Physics, University of California, Berkeley, California 94720
32Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
33Charles University, Faculty of Mathematics and Physics, Prague
34Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544
35Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an
36Instituto de Física, Pontificia Universidad Católica de Chile, Santiago
37California Institute of Technology, Pasadena, California 91125
38College of William and Mary, Williamsburg, Virginia 23187
39Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180
40China General Nuclear Power Group
41College of Electronic Science and Engineering, National University of Defense Technology, Changsha
42Iowa State University, Ames, Iowa 50011
43Chongqing University, Chongqing
刊名: Chinese Physics C, 2017, Vol.41 (1)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1674-1137/41/1/013002
原始语种摘要: A new measurement of the reactor antineutrino flux and energy spectrum by the Daya Bay reactor neutrino experiment is reported. The antineutrinos were generated by six 2.9 GWth nuclear reactors and detected by eight antineutrino detectors deployed in two near (560 m and 600 m flux-weighted baselines) and one far (1640 m flux-weighted baseline) underground experimental halls. With 621 days of data, more than 1.2 million inverse beta decay (IBD) candidates were detected. The IBD yield in the eight detectors was measured, and the ratio of measured to predicted flux was found to be 0.946±0.020 (0.992±0.021) for the Huber+Mueller (ILL+Vogel) model. A 2.9 σ deviation was found in the measured IBD positron energy spectrum compared to the predictions. In particular, an excess of events...
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关键词翻译
关键词翻译
  • antineutrino 反中微子
  • spectrum 光谱
  • measurement 测量
  • reactor 反应器
  • decay 腐败
  • weighted 加权
  • experimental 实验的
  • government 政府
  • China 中国
  • measured 量过的