Di-Neutron Correlation in Low-Lying Octupole Excitation of Medium-Mass Neutron Rich Nuclei

摘要

The pairing effects on the soft excitations of nuclei near the drip-line are very interesting issues. We have discussed the di-ncutron correlation in the soft dipole excitations of medium-mass nuclei near the neutron drip-line.[1] Our motivation is whether the di-neutron correlation appears in the other multipole excitations of near-drip-line nuclei. In this report, by using the continuum quasiparticle random phase approximation(QRPA)[2], we investigate the pairing effects in the low-lying octupole excitations. The continuum QRPA method is appropriate to study of the di-neutron dynamics not only in the nuclear interior but also the nuclear exterior region.