1. Helmholtz-Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
2. GSI GSI Helmholtz Centre for Heavy Ion Research, 64291 Darmstadt, Germany
3. Institute for Theoretical Physics, Friedrich-Schiller-University Jena, 07743 Jena, Germany
4. College of Physics, Jilin University, Changchun 130012, China