现有核物理研究主要是关于原子核单粒子谱和原子核集体激发谱性质，对原子核集团(结团)结构和集团发射的研究相对较少。本项目申请人和课题组成员近年来对原子核集团结构和集团发射进行了初步研究，取得了一些有意义的研究成果，如在Physical Review Letters上发表了两篇论文，其中一篇是关于12Be核集团态(结团态)的实验工作，另一篇是关于20Ne核激发谱集团性质的理论工作。在此基础上，本项目将从实验和理论两个方面深入研究原子核集团态和集团发射，实验上结合国内外核物理大科学装置，利用次级放射性束和放射性核的破裂反应等研究一些远离稳定线核的奇特集团态，理论上发展微观模型，系统研究原子核集团态，计算核集团发射寿命等，通过系统比较理论结果和最新实验数据，分析可能的新物理机制，发展核集团结构模型和集团发射模型，用发展后的方法和模型进行计算，预言一些核集团结构和集团发射寿命，探索新现象和新规律。

The current nuclear researches are mainly devoted to the properties of nuclear single-particle spectra and collective excited spectra. The researches on nuclear cluster structure and nuclear cluster emission are relatively less. In recent years, the applicant of this project and members of this project have performed basic researches on the nuclear cluster structure and cluster emission and obtained some interesting results on them. For example, we published two papers on cluster structure in the Physical Review Letters. One is on the experimental research of the cluster state of 12Be nucleus and another is on the cluster model calculations of the excited spectra of 20Ne. Based on these researches, we plan in this project to investigate further the nuclear cluster structure and cluster emission of other nuclei from both the experimental and theoretical sides. New experiments will be performed in some national laboratories in China and in other countries. By these experiments, the cluster structure of exotic nuclei far from the stability line will be investigated with the secondary radioactive beam and the breakup reaction of radioactive nuclei. Theoretically, the microscopic cluster models will be developed to systematically investigate the nuclear cluster state and the half-lives of cluster emission will also be calculated. By comparison of the theoretical results and the new experimental data, new ideas will be explored to develop nuclear cluster models. We will perform systematic calculations by using developed nuclear cluster model and predict the cluster structure of some nuclei and the half-lives of new emitters for cluster decay.