arXiv · nucl-ex/0610012
Study of the N=50 major shell effect close to $^{78}$Ni : First evidence of a weak coupling structure in $^{83}\_{32}$Ge$\_{51}$ and three-proton configuration states in $^{81}\_{31}$Ga$\_{50}$
Abstract
New levels were attributed to $^{81}\_{31}$Ga$\_{50}$ and $^{83}\_{32}$Ge$\_{51}$ which were fed by the $β$-decay of their respective mother nuclei $^{81}\_{30}$Zn$\_{51}$ and $^{83}\_{31}$Ga$\_{52}$ produced by fission at the "PARRNe" ISOL set-up installed at the Tandem accelerator of the Institut de Physique Nucléaire, Orsay. We show that the low energy structure of $^{81}\_{31}$Ga$\_{50}$ and $^{83}\_{32}$Ge$\_{51}$ can easily be explained within the natural hypothesis of a strong energy gap at N=50 and a doubly-magic character for $^{78}$Ni.
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D. Verney, F. Ibrahim, O. Perru, O. Bajeat, C. Bourgeois, M. Ducourtieux, C. Donzaud, S. Essabaa, S. Gales, L. Gaudefroy, D. Guillemaud-Mueller, F. Hammache, C. Lau, H. Lefort, F. Le Blanc, A. C. Mueller, F. Pougheon, B. Roussiere, J. Sauvage, O. Sorlin. 2006-10-06. Study of the N=50 major shell effect close to $^{78}$Ni : First evidence of a weak coupling structure in $^{83}\_{32}$Ge$\_{51}$ and three-proton configuration states in $^{81}\_{31}$Ga$\_{50}$. https://doi.org/10.1088/1742-6596%2F49%2F1%2F038
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