High-spin studies near looSn with NORDBALL: New results on lo21n, lo41n and lo8Sb.

The NORDBALL detector array has been used in a r-ray spectroscopic study of neutron deficient nuclei close to ‘““Sn. A beam of 270 MeV 5sNi ions was used to bombard a target of “‘Fe. Reaction channel separation was achieved with a 4a charged particle Si-ball together with a lx neutron detector wall. Altogether 29 final nuclei were identified and excited states were observed for the first time in 8 of them. The weakest identified channel was ‘“‘Cd which represented 4.10-s % of the observed total yield. Level schemes of ““In, ““‘In and ““Sb constructed from 7--y-particle-coincidence and r-y-angular correlation analyses are presented. The observed structures are discussed in the framework of the nuclear shell-model. In ““?!ib also a deformed, strongly coupled, level sequence is observed. This deformed structure is interpreted as built on a xg$@uh, ,la configuration in agreement with TRS calculations.