1. School of Physics, Xi’an Jiaotong University, Xi’an 710049, China
2. Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany
3. Laboratory of Quantum Chemistry, Irkutsk State University, Irkutsk 664003, Russia
4. Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Heidelberg 69120, Germany
5. J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States