Mechanism of Coulomb breakup reactions of two-neutron halo nuclei 6He and 11Li

3rd International Workshop on "State of the Art in Nuclear Cluster Physics"

Kikuchi, Yuma^1 ; Myo, Takayuki^2,3 ; Kat, Kiyoshi^4 ; Ikeda, Kiyomi^1

Nishina Center for Accelerator-Based Science, RIKEN, Wako

351-0198, Japan^1

General Education, Faculty of Engineering, Osaka Institute of Technology, Osaka

535-8585, Japan^2

Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki

567-0047, Japan^3

Graduate School of Science, Hokkaido University, Sapporo

060-0810, Japan^4

关键词: Binary subsystems;    Breakup cross sections;    Core excitation;    Coulomb breakup;    Energy distributions;    Final state interactions;    Invariant-mass spectra;    Low energy regions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/569/1/012034/pdf
DOI  :  10.1088/1742-6596/569/1/012034

来源: IOP

【 摘 要 】

We investigate the three-body Coulomb breakup reactions of two-neutron halo nuclei and discuss the correlations of every binary subsystem such as of core-n and n-n by showing the invariant mass spectra. It is found that the final-state interactions of core-n and n-n binary subsystems dominantly determine the observed energy distributions of the breakup cross sections, such as the low-lying enhancements. Furthermore, we investigate the effects of the9Li core excitations on the Coulomb breakup cross section of11Li. It is shown that the integrated E1 strength at low energy region is reduced by ∼ 15 % by the inclusion of the9Li core excitations.