[1] China Inst Atom Energy, Beijing 102413, Peoples R China
[2] Jilin Univ, Coll Phys, Changchun 130021, Peoples R China
[3] Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[4] Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China