Speaker
Dr
Yasutaka TANIGUCHI
(RIKEN Nishina Center for Accelerator-Based Science, RIKEN)
Description
Structures of low-lying states in 42Ca have been studied focusing on deformations and clustering using the antisymmetrized molecular dynamics and the generator coordinate method (GCM).
Energy variation with constraints on quadrupole deformation parameter and inter-cluster distance between and 38Ar clusters obtain GCM basis, which have deformed and {38Ar cluster structures, respectively. The GCM calculations obtain three rotational bands, which have 6p4h, 4p2h and 8p6h congurations relative to the ground state of 40Ca. The 8p6h states deform largely and those are superdeformed states. Members of ground and 4p2h states contain much 38Ar cluster structure components. The 6p4h rotational band has been conrmed experimentally, but existence of the 4p2h and 8p6h deformed states are theoretical predictions.
The ground and 4p2h states contain 38Ar cluster structure components, and those states correspond to the experimental J^pi = 0^+_1 and 0^+_3 states, respectively, because 38Ar(6Li, d) reactions populate the J^pi = 0^+_1 and 0^+_3 states strongly. Unified treatments of deformations and clustering are important for understanding natures of nuclei.
Primary author
Dr
Yasutaka TANIGUCHI
(RIKEN Nishina Center for Accelerator-Based Science, RIKEN)
