Deformed neutron halo nuclei and soft dipole excitations in the 40<A<90 mass region
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866910271262425088 |
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| author | Lu, Xiao Pan, Cong Sagawa, Hiroyuki Sun, Xiang-Xiang Zhou, Shan-Gui |
| author_facet | Lu, Xiao Pan, Cong Sagawa, Hiroyuki Sun, Xiang-Xiang Zhou, Shan-Gui |
| contents | We study deformed neutron halo nuclei in the mass region $40 < A < 90$ and their soft electric dipole ($E1$) excitations based on the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc). Three candidates, $^{43}$Si, $^{69}$Ti, and $^{75}$Cr, are selected for detailed analysis. Unique features are identified in the decoupled densities of possible $s$- and $p$-wave deformed halo nuclei in this mass region, which are influenced by large high-$l$ configurations. It is shown that the dipole response is a highly sensitive observable to detect the halo component of the single-particle wave function in deformed halo nucleus, and it helps identify the configuration and the magnitude of deformation for halo nuclei in the $40 < A < 90$ mass region. Experimental confirmation of the dipole strength in the low-energy region is highly desirable to explore possible deformed halo candidates in the medium-heavy mass region. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_20056 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Deformed neutron halo nuclei and soft dipole excitations in the 40<A<90 mass region Lu, Xiao Pan, Cong Sagawa, Hiroyuki Sun, Xiang-Xiang Zhou, Shan-Gui Nuclear Theory We study deformed neutron halo nuclei in the mass region $40 < A < 90$ and their soft electric dipole ($E1$) excitations based on the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc). Three candidates, $^{43}$Si, $^{69}$Ti, and $^{75}$Cr, are selected for detailed analysis. Unique features are identified in the decoupled densities of possible $s$- and $p$-wave deformed halo nuclei in this mass region, which are influenced by large high-$l$ configurations. It is shown that the dipole response is a highly sensitive observable to detect the halo component of the single-particle wave function in deformed halo nucleus, and it helps identify the configuration and the magnitude of deformation for halo nuclei in the $40 < A < 90$ mass region. Experimental confirmation of the dipole strength in the low-energy region is highly desirable to explore possible deformed halo candidates in the medium-heavy mass region. |
| title | Deformed neutron halo nuclei and soft dipole excitations in the 40<A<90 mass region |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2605.20056 |