1. Hubei Nuclear Solid Physics Key Laboratory, Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan, China
2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
3. Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu, China
4. Department of Physics, School of Science, Guangdong University of Petrochemical Technology, Maoming, China