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Electric dipole response of He-6: Halo-neutron and core excitations

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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
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)

Submitter: 堀内 渉

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