Study of New-type Cluster Structure of Atomic Nuclei

与最近的研究趋势密切相关，我们在核图的大范围内研究了各种新型簇结构。我们主要研究了“富中子核中的团簇结构”、“团簇的气体态”和“超变形与团簇结构”三个主题。在“富中子核中的团簇结构”这一课题中，“用AMD （anti - symmetry molecular dynamics）研究富中子Ne同位素”是在总结2004年以前的研究后的第一个课题。本课题的新主题是“双中子簇相关的研究”，我们发展了一个新的理论形式，结合了双中子簇的凝聚波函数和AMD的使用。对于本课题的中心课题“星系团的气态态”，我们与实验人员密切合作，深入开展了“12C和160 α星系团的玻色致密态研究”。对于12C，我们的研究已经达到了3- α凝聚态和激发态存在的阶段，并得到了高可靠性的证实。对于160个样本，我们首先使用4- α正交性条件模型进行了研究，并在4- α分手阈值附近确定了4- α凝聚态的候选样本。在这些研究中，我们构建了一种新的理论方法来处理宽宽度共振，并将其广泛应用于我们的实际分析。课题“超变形与团簇结构”中，“32S超变形态与160+160分子态关系的研究”是通过总结2004年以前的研究，第一个追求的主题。本课题的主题是“40Ca和44Ti中超演化态和簇态的研究”。我们阐明了类平均场结构和簇状结构的相互渗透以及这两种结构的共存，从而产生各种类型的基态和激发态。在这些研究中，我们开发了“一种新发明的簇结构约束的变分计算新方法”，并将其广泛应用于实际分析。我们还对“Hartree-Fock波函数中包含的聚类分量”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