IN-BEAM GAMMA-RAY SPECTROSCOPY OF CD-102

Neutron deficient nuclei close to Sn-100 have been studied using the N ORDBALL Ge-detector array together with ancillary particle detectors. Evaporation residues from the compound nucleus Te-108 were identified with charged particle and neutron detectors. In this paper a considera ble extension of the level scheme of the nucleus Cd-102 is presented. The strongest cascade of the new level scheme reveals an irregular seq uence of dipole transitions above I-pi = 10(+) extending up to spin 17 . A strongly populated rather regular side band consisting of four qua drupole transitions ranging from spin 9 to spin 17 was also discovered . This band was tentatively assigned negative parity. Shell model calc ulations were performed and a very good agreement with the experimenta l results was found. The excited stares could successfully be interpre ted as neutron particle and proton hole excitations with respect to th e doubly closed core Sn-100(50)50. (C) 1997 Elsevier Science B.V.