| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810 - Japan
[2] Niigata Univ, Dept Phys, Niigata 9502181 - Japan
[3] RIKEN, Nishina Ctr, Wako, Saitama 3510198 - Japan
[4] Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP - Brazil
Total Affiliations: 4
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| Document type: | Journal article |
| Source: | PHYSICAL REVIEW A; v. 105, n. 2 FEB 14 2022. |
| Web of Science Citations: | 0 |
| Abstract | |
In order to efficiently describe nucleon orbits around a heavy core nucleus, we propose locally peaked Gaussians orthogonalized to the occupied bound states in the core. We show the advantage of those functions in both numerical stability and fast convergence by taking examples of touchstone calcium isotopes Ca-62,Ca-72 in Ca-60,Ca-70 +n + n three-body models. Both weakly bound configurations and continuum coupling effect are taken into account. We evaluate the neutron radii and the occupation probabilities of two-neutron configurations not only for the ground state but also for some particle-bound excited states by varying the strength of the core-neutron interaction. The emergence of the halo structure in the ground state depends on the energy difference between 2s(1/)(2 )and 0g(9/2) orbits. Two-neutron {[}consisting of (s(1/2))(2) configuration] and one-neutron {[}consisting of (g(9/2)s(1/2)) configuration] halo structures of Ca-62 can coexist in narrow energy spacing provided that both of 2s(1/)(2) and 0g(9/2) orbits are almost degenerate and barely bound. The ground-state structure of Ca-72 is likely to be a two-neutron halo, although its emergence depends on the position of the 2s(1/)(2) level. (AU) | |
| FAPESP's process: | 15/11828-5 - Few-body approaches in nuclear and atomic condensates |
| Grantee: | Lauro Tomio |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - International |
| FAPESP's process: | 17/05660-0 - Theoretical studies of the structure and reactions of exotic nuclei and many-body systems |
| Grantee: | Brett Vern Carlson |
| Support Opportunities: | Research Projects - Thematic Grants |