Nuclear “bubble” structure in Si 34
2009; American Institute of Physics; Volume: 79; Issue: 3 Linguagem: Inglês
10.1103/physrevc.79.034318
ISSN1538-4497
AutoresM. Grasso, L. Gaudefroy, E. Khan, Tamara Nikšić, J. Piekarewicz, O. Sorlin, Nguyen Van Giai, D. Vretenar,
Tópico(s)Advanced NMR Techniques and Applications
ResumoBubble nuclei are characterized by a depletion of their central density. Their existence is examined within three different theoretical frameworks: the shell model and nonrelativistic and relativistic microscopic mean-field approaches. We analyze $^{34}\mathrm{Si}$ and $^{22}\mathrm{O}$ as possible candidates for proton and neutron bubble nuclei, respectively. In the case of $^{22}\mathrm{O}$, we observe a significant model dependence, thereby calling into question the bubble structure of $^{22}\mathrm{O}$. In contrast, an overall agreement among the models is obtained for $^{34}\mathrm{Si}$. Indeed, all models predict a central proton density depletion of about 40% and a central charge density depletion of 25%--30%. This result provides strong evidence in favor of a proton bubble in $^{34}\mathrm{Si}$.
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