作者机构:[1]Department of Materials Science, Sichuan University, Chengdu 610064, China, [2]CAEP Key Laboratory of Neutron Physics, Mianyang 621900, China, [3]Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
相关基金:Acknowledgements This work was supported by the National Natural Science Foundation of China (NSFC; Grant Nos. 11305152, 51272164, 50772068 and 50972095) and Foundation of Doctor Training Program in University and College in China (Grant Nos. 20030610035 and 20080610020).