Improving the energy resolution of the reactor antineutrino energy reconstruction with positron direction  

作　　者：Lianghong Wei Liang Zhan Jun Cao Wei Wang 

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Nanjing University,Nanjing 210093,China

出　　处：《Radiation Detection Technology and Methods》2020年第3期356-361,共6页辐射探测技术与方法（英文）

基　　金：supported by the Youth Innovation Promotion Association CAS;the National Natural Science Foundation of China under Grant No.11775247;the National Key R&D Pro-gram of China under Grant No.2018YFA0404100

摘　　要：Purpose Improving the energy resolution of the reactor antineutrino energy reconstruction.Methods Simulate the energy resolution of a liquid scintillator detector and reconstruct the antineutrino energy with the positron scattering angle,a simple positron direction reconstruction method is implemented in a toy liquid scintillator detector like the Taishan Antineutrino Observatory(TAO)with 4500 photoelectron yield per MeV.Results A 4%to 26%improvement of energy resolution can be achieved for 5 MeV reactor antineutrinos at TAO.Conclusion The emission direction of the produced positron in IBD reaction can be used to estimate the kinetic energy of neutron and thus the reconstructed antineutrino energy resolution can be improved.

关 键 词：Energy resolution Neutron recoiling Positron direction reconstruction CERENKOV 

分 类 号：O57[理学—粒子物理与原子核物理]