of;
Physical;
Science;
and;
Technology,;
Sichuan;
University,;
Chengdu;
610064,;
China;
of;
Electricity;
Engineering,;
CAEP,;
Mianyang;
621900,;
China;
Laboratory;
of;
Radiation;
Physics;
and;
Technology;
(Sichuan;
University),;
Ministry;
of;
Education,;
Chengdu;
610064,;
China;