| Title |
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Modeling the electric dipole strength of neutron-rich He8: Prediction of multineutron collective excitations
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| Creator |
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| Accessrights |
open access |
| Rights |
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en
©2022 American Physical Society
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| Description |
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Abstract
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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.
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| Publisher |
en
American Physical Society (APS)
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| Date |
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| Language |
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| Resource Type |
journal article |
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VoR |
| Identifier |
HDL
http://hdl.handle.net/2115/87889
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isIdenticalTo
DOI
https://doi.org/10.1103/PhysRevC.106.L021302
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| Journal |
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PISSN
2469-9985
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EISSN
2469-9993
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NCID
AA00773613
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Physical Review C
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Volume Number106
Issue Number2
Page StartL021302
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| File |
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| Oaidate |
2023-07-26 |
