Study of New-type Cluster Structure of Atomic Nuclei

我们密切配合最近的研究趋势，在核图的宽范围内研究了各种新型的团簇结构。我们的研究是围绕“丰中子核中的团簇结构”、“团簇的气体态”和“超形变与团簇结构”三个主要课题进行的。对于“丰中子核中的团簇结构”这一课题，我们的研究主要集中在“丰中子核中的团簇结构”、“团簇的气体态”和“超形变与团簇结构”三个方面。本文在总结2004年以前的研究成果的基础上，首先提出了“反对称分子动力学研究丰中子Ne同位素”的主题。本课题的新主题是“双中子团簇关联的研究“，我们将双中子团簇的凝聚波函数与AMD相结合，发展了一种新的理论形式。对于本课题的中心课题“团簇的气体态”，我们与实验工作者密切合作，致力于“12 C和160 α团簇玻色凝聚态的研究“。对于12 C，我们的研究达到了 关于我们 高可靠性地确认了3-α凝聚态及其激发态的存在的阶段。对于160，我们通过使用4-α正交条件模型开始了研究，并在4-α破裂阈值附近识别了4-α凝聚态的cadidates。在这些研究中，我们构建了一种新的理论方法来处理宽共振，并将其广泛地应用于我们的实际分析中。在“超形变与团簇结构”的主题中，“32 S超形变态与160+160分子态之间关系的研究“是在总结2004年以前研究的基础上所追求的第一个主题。本课题的主题是“~（40）Ca和~（44）Ti的超偏态和团簇态的研究”。阐明了类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各种基态和激发态。对于这些研究，我们开发了“新的变分计算方法与新发明的集群结构的约束”，并广泛使用它，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。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