Moments of inertia in light deformed nuclei: pairing and mean-field impacts
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| Format: | Preprint |
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2023
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| _version_ | 1866913343590105088 |
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| author | Nesterenko, V. O. Mardyban, M. A. Reinhard, P. -G. Repko, A. Kvasil, J. |
| author_facet | Nesterenko, V. O. Mardyban, M. A. Reinhard, P. -G. Repko, A. Kvasil, J. |
| contents | The dependence of the moment of inertia $\cal J$ on the pairing and axial quadrupole deformation $β$ in $^{24}$Mg and $^{20}$Ne was investigated. The study is based on quadrupole-constrained calculations with three cranking approaches for $\cal J$ (Inglis-Belyaev, Thouless-Valatin, adiabatic time-dependent Hartree-Fock) and a representative set of Skyrme forces (SVbas, SkM*, SLy6). At variance with macroscopic collective models, the calculations predict the specific regime $d{\cal J}/dβ<0$ at $β\ge 0.5$ ($^{24}$Mg) and $β\ge 0.6$ ($^{20}$Ne), where the pairing breaks down. This regime is explained by two effects: full break up of the pairing and specific evolution of a {\it single} dominant particle-hole (1ph) configuration with $β$. The analysis of experimental data for the ground-state rotational bands in $^{24}$Mg and $^{20}$Ne shows that such regime is possible at low spins. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2304_10873 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Moments of inertia in light deformed nuclei: pairing and mean-field impacts Nesterenko, V. O. Mardyban, M. A. Reinhard, P. -G. Repko, A. Kvasil, J. Nuclear Theory Nuclear Experiment The dependence of the moment of inertia $\cal J$ on the pairing and axial quadrupole deformation $β$ in $^{24}$Mg and $^{20}$Ne was investigated. The study is based on quadrupole-constrained calculations with three cranking approaches for $\cal J$ (Inglis-Belyaev, Thouless-Valatin, adiabatic time-dependent Hartree-Fock) and a representative set of Skyrme forces (SVbas, SkM*, SLy6). At variance with macroscopic collective models, the calculations predict the specific regime $d{\cal J}/dβ<0$ at $β\ge 0.5$ ($^{24}$Mg) and $β\ge 0.6$ ($^{20}$Ne), where the pairing breaks down. This regime is explained by two effects: full break up of the pairing and specific evolution of a {\it single} dominant particle-hole (1ph) configuration with $β$. The analysis of experimental data for the ground-state rotational bands in $^{24}$Mg and $^{20}$Ne shows that such regime is possible at low spins. |
| title | Moments of inertia in light deformed nuclei: pairing and mean-field impacts |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2304.10873 |