1. Beijing Synchrotron Radiation Facility
(BSRF), Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2. Department of Geological
Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas 78712,
United States
3. Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China