1. HiPSEC & Physics Department, University of Nevada, Las Vegas, Nevada 89154, United States
2. Institute of Atomic & Molecular Physics, Sichuan University, Chengdu 610065, China
3. Los Alamos National Laboratory, Los
Alamos, New Mexico 87545, United States
4. Institute
of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, China
5. National Institute of Clean- & Low-Carbon Energy (NICE), Beijing 102209, China
6. Synfuels China, Beijing, 100195, China
7. Institute
of Physics, Chinese Academy of Sciences, Beijing 100190, China
8. Oak Ridge National Laboratory, Oak
Ridge, Tennessee 37831, United States