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Modeling the electric dipole strength of neutron-rich He8: Prediction of multineutron collective excitations
| Title: | Modeling the electric dipole strength of neutron-rich He8: Prediction of multineutron collective excitations |
| Authors: | Myo, Takayuki Browse this author | | Katō, Kiyoshi Browse this author →KAKEN DB |
| Issue Date: | 2-Aug-2022 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review C |
| Volume: | 106 |
| Issue: | 2 |
| Start Page: | L021302 |
| Publisher DOI: | 10.1103/PhysRevC.106.L021302 |
| Abstract: | We investigate the multineutron excitations of neutron-rich 8He in the electric dipole strength using a 4He+n + n + n + n five-body model. Many-body unbound states of 8He are obtained in the complex scaling method. We found that the different excitation modes coexist in the dipole strength below the excitation energy of 20 MeV. The strength below 10 MeV comes from the 7He+n channel, ndicating the sequential breakup of 8He via the 7He resonance to 6He+n + n. Above 10 MeV, the strength is obtained from many-body continuum states with strong configuration mixings, suggesting a new collective motion of four neutrons with the dipole oscillation against 4He. |
| Rights: | ©2022 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/87889 |
| 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: 加藤 幾芳
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