Extraction of the U235 and Pu239

物理谱线同位素能量（信号处理）反向核物理学数学几何学量子力学天文

作者

D. Adey,Fengpeng An,A. B. Balantekin,H. R. Band,M. Bishai,S. Blyth,D. Cao,G. F. Cao,Jun Cao,J. F. Chang,Y. Chang,H. S. Chen,S. M. Chen,Y. Chen,Y. X. Chen,Jie Cheng,Z. K. Cheng,J. J. Cherwinka,M. C. Chu,A. Chukanov,J. P. Cummings,N. Dash,F. S. Deng,Y. Y. Ding,M. Diwan,Tadeáš Dohnal,J. Dove,Martin Dvořák,D. A. Dwyer,M. Gonchar,G. Gong,Haipeng Gong,W. Q. Gu,J. Y. Guo,Lei Guo,Xin-Heng Guo,Yuhang Guo,Ziyi Guo,R. Hackenburg,S. Hans,M. He,K. M. Heeger,Y. K. Heng,A. Higuera,Y. K. Hor,Y. Hsiung,Beibei Hu,Jun Hu,T. Hu,Z. Hu,H. X. Huang,X. T. Huang,Y. B. Huang,Patrick Huber,D. E. Jaffe,K. L. Jen,X. L. Ji,X. Ji,R. A. Johnson,D. Jones,Li-Wei Kang,S. H. Kettell,L. W. Koerner,S. Kohn,M. Krämer,T. J. Langford,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. Li,S. J. Li,W. D. Li,X. N. Li,X. Q. Li,Yufeng Li,Zhibing Li,H. Liang,C. J. Lin,Guey-Lin Lin,Shengxin Lin,J. J. Ling,J. M. Link,L. Littenberg,B. R. Littlejohn,J. C. Liu,J. L. Liu,Y. Liu,Y. H. Liu,C. Lu,H. Q. Lu,J. S. Lu,X.-G. Lu,X. B.,X. Y.,Y. Q.,C. Marshall,D. A. Martínez Caicedo,K. T. McDonald,R. D. McKeown,I. V. 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,N. Raper,Jie Ren,R. Rosero,B. Roskovec,X. C. Ruan,H. Steiner,J. L. Sun,Konstantin Treskov,W.-H. Tse,C. E. Tull,B. Viren,V. Vorobel,C. H. Wang,Jun Wang,M. Wang,N. Y. Wang,R. G. Wang,Xiang-Gao Wang,Xiang-Gao Wang,Xiang-Gao Wang,Y. Wang,Y. F. Wang,Zhu Wang,Zhe Wang,Zhe Wang,H. Wei,L. H. Wei,Liangjian Wen,K. Whisnant,C. G. White,H. L. H. Wong,S. C. F. Wong,E. Worcester,Qian Wu,W. Wu,D. M. Xia,Z. Z. Xing,Jilei Xu,T. Xue,C. G. Yang,L. Yang,M. Yang,Y. Z. Yang,M. Ye,M. Yeh,Ben Young,H. Z. Yu,Zeyuan Yu,B. B. Yue,S. Zeng,Y. Zeng,Liang Zhan,C. Zhang,C. C. Zhang,Feifan Zhang,H. H. Zhang,J. W. Zhang,Qingmin 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. Y. Zhao,L. Zhou,H. L. Zhuang,J. H. Zou

出处

期刊：Physical Review Letters [American Physical Society]
日期：2019-09-13 卷期号：123 (11) 被引量：53

链接

aps.org osti.gov arxiv.org arxiv.org osti.gov osti.gov caltech.edu caltech.edu nih.gov datacite.orgdoi.org

标识

DOI：10.1103/physrevlett.123.111801

摘要

This Letter reports the first extraction of individual antineutrino spectra from ^{235}U and ^{239}Pu fission and an improved measurement of the prompt energy spectrum of reactor antineutrinos at Daya Bay. The analysis uses 3.5×10^{6} inverse beta-decay candidates in four near antineutrino detectors in 1958 days. The individual antineutrino spectra of the two dominant isotopes, ^{235}U and ^{239}Pu, 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 ^{235}U (^{239}Pu) spectrum compared with the normalized Huber-Mueller model prediction. The significance of discrepancy is 4.0σ for ^{235}U 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.

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Extraction of the U235 and Pu239

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