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Electric dipole response of He-6: Halo-neutron and core excitations
| Title: | Electric dipole response of He-6: Halo-neutron and core excitations |
| Authors: | Mikami, D. Browse this author | | Horiuchi, W. Browse this author →KAKEN DB | | Suzuki, Y. Browse this author |
| Issue Date: | 6-Jun-2014 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review C |
| Volume: | 89 |
| Issue: | 6 |
| Start Page: | 64303 |
| Publisher DOI: | 10.1103/PhysRevC.89.064303 |
| Abstract: | Electric dipole (E1) response of He-6 is studied with a fully microscopic six-body calculation. The wave functions for the ground and excited states are expressed as a superposition of explicitly correlated Gaussians. Final state interactions of three-body decay channels are explicitly taken into account. The ground state properties and the low-energy E1 strength are obtained consistently with observations. Two main peaks as well as several small peaks are found in the E1 strength function. The peak at the high-energy region indicates a typical macroscopic picture of the giant dipole resonance, the out-of-phase proton-neutron motion. The transition densities of the lower-lying peaks exhibit in-phase proton-neutron motion in the internal region, out-of-phase motion near the surface region, and spatially extended neutron oscillation, indicating a soft-dipole mode and its vibrationally excited mode. The compressional dipole strength is also examined in relation to the soft-dipole mode. |
| Rights: | ©2014 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/57335 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 堀内 渉
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