Nuclear linear-chain structure arises in carbon-14

Communications Physics

Article

Liyuan Hu¹  Yao Li¹  Junwei Li¹  Yushou Song¹  Yanyun Yang²  Zhen Bai²  Shuya Jin²  Shiwei Xu²  Fangfang Duan²  Herun Yang²  Peng Ma²  Junbing Ma²  Jiansong Wang³  Meirong Huang⁴  Suyalatu Zhang⁴  Dexin Wang⁴  Kang Wei⁵  Qite Li⁵  Ying Chen⁵  Lisheng Yang⁵  Gen Li⁵  Hui Hua⁵  Shiwei Bai⁵  Xiaofei Yang⁵  Jingjing Li⁵  Jinyan Xu⁵  Kai Ma⁵  Yucheng Ge⁵  Yanlin Ye⁵  Weiliang Pu⁵  Zhiwei Tan⁵  Shujing Wang⁵  Jiahao Chen⁵  Zhihuan Li⁵  Jianling Lou⁵  Ziyao Hu⁵  Longchun Tao⁵  Zaihong Yang⁵  Biao Yang⁵  Wei Liu⁵  Dongxi Wang⁵  Siwei Huang⁵  Hanzhou Yu⁵  Yang Liu⁶  Ying Jiang⁶  Jiaxing Han⁶  Ziming Li⁷ 

[1] Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, 150001, Harbin, China;Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China;Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China;School of Science, Huzhou University, 313000, Huzhou, China;Institute of Nuclear Physics, Inner Mongolia Minzu University, 028000, Tongliao, China;School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, 100871, Beijing, China;School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, 100871, Beijing, China;Institute of Materials, China Academy of Engineering Physics, 621907, Mianyang, China;School of Physics, Beihang University, 100191, Beijing, China;

关键词: ;   

DOI  :  10.1038/s42005-023-01342-6

 received in 2022-08-18, accepted in 2023-08-09,  发布年份 2023

来源: Springer

【 摘 要 】

The shape and internal structure of an atomic nucleus can change significantly with increasing excitation energy, angular momentum, or isospin asymmetry. As an example of this structural evolution, linear-chain configurations in carbon or heavier isotopes have been predicted for decades. Recent studies have found non-stability of this structure in 12C while evidenced its appearance in 16C. It is then necessary to investigate the linear-chain molecular structures in 14C to clarify the exact location on the nuclear chart where this structure begins to emerge, and thus to benchmark theoretical models. Here we show a cluster-decay experiment for 14C with all final particles coincidentally detected, allowing a high Q-value resolution, and thus a clear decay-path selection. Unambiguous spin-parity analyses are conducted, strongly evidencing the emergence of the π-bond linear-chain molecular rotational band in 14C. The present results encourage further studies on even longer chain configurations in heavier neutron-rich nuclei.

【 授权许可】

CC BY   
© Springer Nature Limited 2023

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