Speaker
Description
Correlated nucleons can form various clusters such as $α$ cluster, which can further give rise to intriguing cluster structures in light nuclei, taking the Hoyle state of $^{12}\rm C$ with a 3-$α$ cluster structure as an example. In recent years, important progress has been made in studying the cluster structure of excited states of light neutron-rich nuclei, such as the molecular resonant state of $^{12}\rm Be$ [1] and the 3$α$-linear-chain states of carbon isotopes [2]. Formation of clusters in the ground state of light nuclei has been theoretically predicted, but has been barely studied, particularly in unstable nuclei.
The cluster knockout reaction such as (p, p$α$) has been shown to be a sensitive probe for clusters in the ground state of nuclei [3,4]. We have measured the $α$-cluster knockout reaction on $^{10}\rm C$ and $^{10}\rm Be$ at the HIRFL-RIBLL beam line (IMP, Lanzhou, China) to study their dumbbell-like 2-$α$ cluster structure. Some preliminary results of the experiment will be presented.
[1] Z. H. Yang, et al., Phys. Rev. Lett. 112, 162501 (2014).
[2] Y. Liu, et al., Phys. Rev. Lett. 124, 192501 (2020).
[3] J. Tanaka, Z.H. Yang, et. al, Science. 371, 260 (2021).
[4] P. J. Li, et al., Phys. Rev. Lett. 131, 212501 (2023).
