Department of Technical Physics and MOE Laboratory of Heavy Ion Physics;
Peking University;
Beijing 100871;
China;
Center of Theoretical Nuclear Physics;
National Laboratory of Heavy Ion Accelerator;
Lanzhou 730000;
China;
Institute of Modern Physics;
The Chinese Academy of Sciences;
Lanzhou 730000;
China;
Department of Physics;
Peking University;
Beijing 100871;
China;