丰中子C同位素中链状分子态的实验研究

基于近年原子核集团结构研究在国际上的发展，以及申请人负责的实验团队在丰中子Be同位素集团结构研究中取得的成果和积累的研究基础，本项目提出对具有三中心特点的丰中子C同位素的集团结构开展实验研究，特别是寻找和确定理论预言的14-16C高激发态中奇特的线型链状分子态结构。研究内容涉及转动惯量、集团衰变分支比、特征激发强度、选择性衰变路径等四个方面物理量的观测和与理论密切结合的分析。实验技术路线主要包括利用中能14-16C放射性束的非弹激发和破裂反应、以及稳定核的低能多核子转移反应末态的激发和衰变。实验主要基于国内的大科学装置，采用先进的硅微条带电粒子望远镜阵列，利用自主建立并已成功运用的0度探测等实验方法, 有望在当前国际上关于原子核线型链状分子态研究的激烈竞争中较快取得高确定度的实验结果。

Based on the international progress of the nuclear clustering studies, and on the achievements and research experiences accumulated by our team over the past few years for the neutron-rich Be isotopes, we propose to study experimentally the cluster structure of the neutron-rich carbon isotopes which possess three centers. The particular efforts will be devoted to search for the predicted exotic linear-chain-states in the high-excited states of 14-16C. The experiments will be designed to measure the moment of inertial of the relevant molecular-band, the cluster-decay branching ratio, the characteristic excitation strength and the selective decay paths. The reaction tools to be used include the excitation and breakup of the 14-16C by using the medium-energy radioactive beams, and the population and decay of the 14-16C nuclei via the multi-nucleon transfer reaction from a stable nucleus beam. The experiments will be carried out at the national big facilities, using the advanced Si-trip detector array and employing the proper detection methods which have been established and successfully used previously. This project is aiming at giving firm results for the linear-chain structure in neutron-rich nuclei.