Quasideuterons in Light Nuclei
| Autor: | Müther, H., Srivastava, Praveen C. |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Journal of Physics G 50 (2023) 065101 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1361-6471/acca36 |
| Popis: | The role of pairing correlations for nucleon pairs with isospin $T=1$ and $T=0$ is investigated for nuclei in the mass region $12 \leq A \leq 42$. For that purpose the two-nucleon densities resulting from nuclear shell-model calculations in one and two major shells are analyzed. Significant effects on the resulting energies are observed due to the formation of $T=0$ pairs. The formation of quasi-deuterons is maximal for symmetric nuclei with $N=Z$. The formation of $T=0$ pairs is less sensitive to the density of single-particle states close to the Fermi energy than the $T=1$ pairing and is relevant also for excitations across shell-closures. This robustness also explains why $T=0$ pairing does not lead to such a clear evidence in comparing energies of neighbored nuclei as the "odd-even mass staggering" due to the formation of $T=1$ pairing. Comment: 8 pages, 5 figure |
| Databáze: | arXiv |
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