Coulomb Excitation of Soft Dipole States in ^6He and ^<11>Li and Its Effects on the Elastic Scattering
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概要
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The Coulomb excitation of the soft-dipole mode (SDM) and its dynamical effect on the elastic scattering of halo nuclei, ^6He and ^<11>Li at E_<lab>/A_p=5〜70 MeV, are investigated in the microscopic coupled-channel (CC) method. The Goldhaber-Teller (GT) model is employed to calculate the transition density for SDM. The proton and neutron density distributions as well as the dipole-transition strengths, which are the input to the GT model, are given by the coupled-rearrangement-channel variational method based on an α+n+n three-body model for ^6He, and by a ^9Li+dineutron two-cluster-model calculation for ^<11>Li. The results of the CC calculations show that the effect of the Coulomb excitation of SDM on the elastic scattering is quite significant, while the nuclear contribution is relatively small. We also investigate the characteristics of the Coulomb-dissociation cross sections, such as the energy dependence and the target dependence in the same model.
- 理論物理学刊行会の論文
- 1995-02-25