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$\_{50}$

Details 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$\_{50}$ 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$\_{50}$

2006-10-06

arxiv.org/abs/nucl-ex/0610012v1

J.Phys.Conf.Ser.49:170-171,2006

Physics

Nuclear Physics

Nuclear Experiment

2 pages, pdf file, To be published in the Proceedings of "International Symposium on Structure of Exotic Nuclei and Nuclear Fo

Scientific paper

10.1088/1742-6596/49/1/038

New levels were attributed to $^{81}\_{31}$Ga$\_{50}$ and $^{83}\_{32}$Ge$\_{51}$ which were fed by the $\beta$-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 Nucl\'eaire, 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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