Cluster correlations in largely deformed states

10th International Conference on Clustering Aspects of Nuclear Structure and Dynamics

Taniguchi, Yasutaka^1

Center for Computational Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba-city, Ibaraki 305-8577, Japan^1

关键词: Antisymmetrized Molecular dynamics;    Cluster structure;    Energy variations;    Generator coordinate methods;    Ground-state band;    Low-lying state;    Quadrupole deformations;    Transition strengths;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/436/1/012055/pdf
DOI  :  10.1088/1742-6596/436/1/012055

来源: IOP

【 摘 要 】

The coexistence of various deformed states in42Ca and α-38Ar correlations have been investigated using deformed-basis antisymmetrized molecular dynamics. Wavefunctions of the low-lying states are obtained via parity and angular momentum projections and the generator coordinate method (GCM). Basis wavefunctions of the GCM calculation are obtained via energy variation with constraints on the quadrupole deformation parameter β and the distance between α and38Ar clusters. The rotational band built on the Jπ= 02+(1.84 MeV) state as well as the Jπ= 03+(3.30 MeV) state are both reproduced. The coexistence of two additional Kπ= 0+rotational bands is predicted; one band is shown to be built on the Jπ= 03+state. Members of the ground-state band and the rotational band built on the Jπ= 03+state contain α-38Ar cluster structure components. The α-38Ar higher-nodal Jπ= 0+state is also obtained, and the Jπ= 0+state has large E0 transition strength from the ground state.