| Title | Novel evidence for the sigma-bond linear-chain molecular structure in C-14 |
| Authors | Yu, Han-zhou Li, Jing Ye, Yan-Lin Yang, Biao Lin, Cheng-Jian Jia, Hui-Ming Lou, Jian-Ling Yang, Xiao-Fei Baba, T. Li, Qi-Te Ge, Yu-Cheng Li, Zhi-Huan Hua, Hui Xu, Jin-Yan Yang, Zai-Hong Feng, Jun Zang, Hong-Liang Liu, Qiang Jiang, Wei Liu, Yang Li, Jing-Jing Liu, Wei Bai, Shi-Wei Chen, Jie Han, Jia-Xing Chen, Jia-Hao Ma, Kai Wang, Dong-Xi Yang, Lei Ma, Nan-Ru Sun, Li-Jie |
| Affiliation | Peking Univ, Sch Phys, Beijing 100871, Peoples R China Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China Michigan State Univ, FRIB NSCL Lab, E Lansing, MI 48824 USA China Inst Atom Energy, Beijing 102413, Peoples R China Kitami Inst Technol, Kitami, Hokkaido 0908507, Japan Osaka Univ, Res Ctr Nucl Phys RCNP, 10-1 Mihogaoka, Ibaraki, Osaka 5670047, Japan Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China |
| Keywords | STATES |
| Issue Date | Aug-2021 |
| Publisher | CHINESE PHYSICS C |
| Abstract | A multi-nucleon transfer and cluster decay experiment, Li-7(B-11, C-14* -> alpha+Be-10)alpha, is conducted at an incident beam energy of 55 MeV. This reaction channel has a significantly large Q-value, which favors populating the high lying resonant states in C-14. The decay paths, from these resonances to various states of the final nucleus Be-10, can be selected, owing to the experimentally achieved optimal resolution of the Q-value spectrum. A number of resonant states are reconstructed from the forward emitting Be-10 + alpha fragments, and their major molecular structures can be detected according to the selective decay paths and relative decay widths. A state at 22.4(2) MeV validates the previously measured and theoretically predicted band head of the positive-parity sigma-bond linear-chain molecular band. Two additional resonances at 22.9(2) and 24.2(2) MeV are identified and consistent with the predicted 2(+) and 4(+) members of the same molecular band, thus providing novel evidences for the existence of the exotic clustering chain structure in neutron-rich carbon isotopes. A few high energy resonances, which also indicate the presence of the sigma-bond molecular structure, are observed; however, further studies are still required to clarify their ascription in band systematics. |
| URI | http://hdl.handle.net/20.500.11897/634617 |
| ISSN | 1674-1137 |
| DOI | 10.1088/1674-1137/ac04a0 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 其他实验室 核物理与核技术国家重点实验室 |
