1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, 621900 Mianyang, Sichuan, China
2. Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraβe 400, 01328 Dresden, Germany
3. The Rossendorf Beamline at ESRF, The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France