作者机构:[1]Institute of Nuclear Physics, Lanzhou University, Lanzhou 730000, China
相关基金:Project supported by the Research Fund for the Doctoral Program of Higher Education, China (Grant No 20030730004), the National Natural Science Foundation of China (Grant No 10374039) and the Natural Science Foundation of Gansu Province, , China .(G_ra_nt N oZS031-A25-001-Z).