[Yu, T.;Cao, P.;Huang, X. R.;An, Q.;Feng, C. Q.;Liu, S. B.;Yu, L.] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China.^[Yu, T.;Cao, P.;Huang, X. R.;An, Q.;Feng, C. Q.;Liu, S. B.;Yu, L.] Key Lab Particle Detect & Elect, Hefei 230026, Peoples R China.^[Ji, X. Y.;Xie, L. K.] Univ Sci & Technol China, Dept Engn & Appl Phys, Hefei 230026, Peoples R China.^[Ji, X. Y.;Xie, L. K.;Fan, R. R.;Sun, Z. J.;Zhang, L. Y.] State Key Lab Particle Detect & Elect, Hefei 230026, Peoples R China.^[Bai, H. Y.;Cui, Z. Q.;Jiang, H. Y.;Zhang, G. H.] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Inst Heavy Ion Phys, Beijing 100871, Peoples R China.^[Bao, J.;He, G. Z.;Huang, H. X.;Luan, G. Y.;Ren, J.;Ruan, X. C.;Tang, H. Q.;Wang, Q.;Wang, Z. H.;Wu, X. G.;Zhang, Q. W.;Zhong, Q. P.;Zhou, Z. Y.] China Inst Atom Energy, Beijing 102413, Peoples R China.^[Chen, Y. H.;Fan, R. R.;Gu, M. H.;He, Y. C.;Huang, W. L.;Ji, X. L.;Jiang, W.;Jing, H. T.;Kang, L.;Li, B.;Li, L.;Li, Q.;Li, X.;Ma, Y. L.;Ning, C. J.;Sun, H.;Sun, X. Y.;Sun, Z. J.;Tan, Z. X.;Tang, J. Y.;Wang, P. C.;Wang, Y. F.;Wang, Z.;Wu, Q. B.;Wu, X.;Yi, H.;Yu, Y. J.;Zhang, L. Y.;Zhang, J.;Zhou, L.;Zhu, K. J.] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.^[Chen, Y. H.;Fan, R. R.;Gu, M. H.;He, Y. C.;Huang, W. L.;Ji, X. L.;Jiang, W.;Jing, H. T.;Kang, L.;Li, B.;Li, L.;Li, Q.;Li, X.;Ma, Y. L.;Ning, C. J.;Sun, H.;Sun, X. Y.;Sun, Z. J.;Tan, Z. X.;Tang, J. Y.;Wang, P. C.;Wang, Y. F.;Wang, Z.;Wu, Q. B.;Wu, X.;Yi, H.;Yu, Y. J.;Zhang, L. Y.;Zhang, J.;Zhou, L.;Zhu, K. J.] Dongguan Neutron Sci Ctr, Dongguan 523803, Peoples R China.^[Cheng, P. J.] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.^[Han, Z. J.;Liu, R.;Liu, X. Y.;Wen, J.;Wen, Z. W.;Yang, Y. W.] CAEP, Inst Nucl Phys & Chem, Mianyang 621900, Sichuan, Peoples R China.^[He, Y. F.] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.^[Song, Z. H.;Zhang, X. P.] Northwest Inst Nucl Technol, Xian 710000, Shaanxi, Peoples R China.^[Wang, T. F.] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100083, Peoples R China.^[Zhang, Q. M.;Zhao, Y. T.] Xi An Jiao Tong Univ, Dept Nucl Sci & Technol, Sch Energy & Power Engn, Xian 710049, Peoples R China.