*Review* **Trends in the Structure of Nuclei near 100Sn**

**Magdalena Górska**

GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany; m.gorska@gsi.de

**Abstract:** Inevitable progress has been achieved in recent years regarding the available data on the structure of 100Sn and neighboring nuclei. Updated nuclear structure data in the region is presented using selected examples. State-of-the-art experimental techniques involving stable and radioactive beam facilities have enabled access to those exotic nuclei. The analysis of experimental data has established the shell structure and its evolution towards *N=Z=* 50 of the number of neutrons, *N*, and the atomic number, *Z*, seniority conservation and proton–neutron interaction in the *g*9/2 orbit, the super-allowed Gamow–Teller decay of 100Sn, masses and half-lives along the rapid neutroncapture process (r-process) path and super-allowed α decay beyond 100Sn. The status of theoretical approaches in shell model and mean-field investigations are discussed and their predictive power assessed. The calculated systematics of high-spin states for *N =* 50 isotopes including the 5− state and *N=Z* nuclei in the *g*9/2 orbit is presented for the first time.

**Keywords:** nuclear structure; shell model; magic nuclei; gamma-ray spectroscopy
