Nuclear structure aspects of the heaviest N∼Z nuclei south of 100Sn

Ever-lasting interest in the structure of Sn-100 and neighbouring nuclei is still well justified by the fact that it is the heaviest doubly-magic nucleus with N=Z. State-of-the-art experimental techniques involving stable and radioactive beam facilities have enabled access to these exotic nuclei. In particular, the analysis of experimental data obtained in two DESPEC experiments at GSI Darmstadt extends the information on the shell structure and its evolution towards N = Z = 50, and allows the study of seniority conservation and proton-neutron interaction in the g(9/2) orbit. Several theoretical approaches for shell-model investigations are discussed and their predictive power assessed. The calculated systematics of the reduced transition probabilities for high- to medium-spin states in N similar to Z isotopes with active g(9/2) orbit is presented for the first time.

Automated summary

The study of Sn-100 and neighbouring nuclei is important due to its status as the heaviest doubly-magic nucleus with N=Z. Experimental techniques have allowed access to these exotic nuclei, and the analysis of data from two DESPEC experiments extends our understanding of the shell structure and proton-neutron interaction. Theoretical approaches for shell-model investigations are discussed and the predictive power of these models is assessed. The first systematic calculation of reduced transition probabilities for N similar to Z isotopes with active g(9/2) orbit is presented.