Study of New-type Cluster Structure of Atomic Nuclei

顺应最近的研究趋势，我们在核图的大范围内研究了各种新型的团簇结构。我们在总结2004年前的研究成果的基础上，对三个主要主题：富中子核中的团簇结构、团簇的气体状态和超形变与团簇结构进行了研究。对于富中子核中的团簇结构，用反对称分子动力学研究富中子Ne同位素是第一个主题。本课题的新主题是“双中子团簇关联的研究”，我们发展了一种新的理论形式，将双中子团的凝聚波函数与AMD相结合。对于本研究项目的中心课题“团簇的气态”，我们与实验者密切合作，集中开展了“12C和160中α团簇玻色凝聚态的研究”。对于12C，我们的研究达到了…进一步证实了3-α凝聚态及其激发态的存在具有较高的可靠性。对于160，我们使用4-α正交性条件模型启动了这项研究，并确定了4-α凝聚态在4-α破裂阈值附近的日期。在这些研究中，我们构建了一种处理宽共振的新的理论方法，并将其广泛应用于我们的实际分析中。对于“超形变与团簇结构”这一课题，在总结2004年前的研究成果的基础上，“研究32S和160个160分子超形变态之间的关系”是我们第一个追求的主题。这门课的主题是“40Ca和44Ti的超电子态和团簇状态的研究”。我们阐明了平均场结构和团簇结构的相互渗透，以及这两种结构的共存导致了不同类型的基态和激发态。在这些研究中，我们发展了“新发明的团簇结构约束变分计算方法”，并将其广泛应用于实际分析。我们还对“Hartree-Fock波函数中包含的团簇成分”进行了研究。较少

Corresponding intimately to the recent research trend, we investigated various new-types of cluster structure in wide region of the nuclear chart.Our study was made for three major subjects, "Cluster structure in neutron-rich nuclei", "Gas states of clusters", and "Superdeformation and cluster structure".For the subject "Cluster structure in neutron-rich nuclei", " Neutron-rich Ne isotopes studied with AMD (antisymmetrized molecular dynamics) " was the first theme pursuied by summarizing the former studies before 2004. The new theme for this subject was " Study of di-neutron cluster correlation " and we developed a new theoretical formalism which combines the use of the condensed wave function of di-neutron cluster and the AMD.For the subject "Gas states of clusters" which was the central subject of this research project, we intensively pursuied " Study of Bose-cindensed states of alpha clusters in 12C and 160 " with close collaboration with experimentalists. For 12C our study reached … More the stage where the existence of 3-alpha condensed state and its excited states was confirmed with high reliability. For 160, we initiated the study by the use of the 4-alpha orthogonality condition model and identified cadidates of the 4-alpha condensed state in the vicinity of the 4-alpha breakup threshold. In these studies, we constructed a new theoretical method to treat resonances with wide width and utilized it extensively for our actual analyses.For the subjects, "Superdeformation and cluster structure", "' Study of the relation between superdeformed states in 32S and 160+160 molecular states " was the first theme pursuied by summarizing the former studies before 2004. The main theme for this subject was " Study of superdefoed states and cluster states in 40Ca and 44Ti ". We clarified the mutual penetration of mean-field-like structure and cluste structure and also the coexistence of these two structures which result in various types of ground and excited states. For these studies we developed " New method of variational calculation with a newly invented constraint for the cluster structure " and utilized it extensively, for actual analyses. We also made a study on " Cluster components contained in the Hartree-Fock wave functions ". Less