IN-BEAM SPECTROSCOPY AT THE PROTON-DRIP LINE - FIRST OBSERVATION OF EXCITED-STATES IN SB-106 AND SB-107

Neutron deficient nuclei close to Sn-100 have been investigated in-bea m using the NORDBALL detector array. A target of Fe-54 was bombarded w ith a beam of Ni-58 at 270 MeV. Evaporation residues were identified b y detecting protons and alpha particles in a 4 pi charged particle mul ti-detector set-up and neutrons in a 1 pi neutron detector wall in coi ncidence with gamma rays. Excited states of the proton drip line nucle us Sb-106 and of Sb-107 were identified for the first time. The yrast level schemes constructed from gamma-gamma-particle coincidence and ga mma-gamma angular correlation analysis are presented and discussed wit hin the framework of the nuclear shell model.