Communications Physics (Aug 2023)

Nuclear linear-chain structure arises in carbon-14

  • Jiaxing Han,
  • Yanlin Ye,
  • Jianling Lou,
  • Xiaofei Yang,
  • Qite Li,
  • Zaihong Yang,
  • Yanyun Yang,
  • Jiansong Wang,
  • Jinyan Xu,
  • Yucheng Ge,
  • Hui Hua,
  • Zhihuan Li,
  • Biao Yang,
  • Yang Liu,
  • Shiwei Bai,
  • Kai Ma,
  • Jiahao Chen,
  • Gen Li,
  • Ziyao Hu,
  • Hanzhou Yu,
  • Zhiwei Tan,
  • Lisheng Yang,
  • Shujing Wang,
  • Longchun Tao,
  • Wei Liu,
  • Ying Jiang,
  • Jingjing Li,
  • Dongxi Wang,
  • Siwei Huang,
  • Ying Chen,
  • Weiliang Pu,
  • Kang Wei,
  • Junbing Ma,
  • Herun Yang,
  • Peng Ma,
  • Shiwei Xu,
  • Zhen Bai,
  • Shuya Jin,
  • Fangfang Duan,
  • Yushou Song,
  • Liyuan Hu,
  • Yao Li,
  • Junwei Li,
  • Suyalatu Zhang,
  • Meirong Huang,
  • Dexin Wang,
  • Ziming Li

DOI
https://doi.org/10.1038/s42005-023-01342-6
Journal volume & issue
Vol. 6, no. 1
pp. 1 – 10

Abstract

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Abstract 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.