The Key Laboratory of Beam Technology and Materials Modification of Ministry of Education;
Beijing Normal University;
Beijing 100875;
China;
Institute of Low Energy Nuclear Physics;
Beijing Normal University;
Beijing 100875;
China;
Beijing Radiation Center;
Beijing Normal University;
Beijing 100875;
China;
Institut fiir Theoretische Physik I;
Ruhr-Universitaet Bochum;
D-44780 Bochum;
Germany;