Search for high-spin isomeric states in the rare-earth region

Several new high-spin (I>10) isomeric states in the mass region A=144–164 are located in a systematic search with ¹²C induced reactions, employing a sixteen NaI (Tl)Ge(Li) detector multiplicity filter. The proximity to the N=82 neutron shell closure strongly suggests that shell effects contribute significantly to this isomerism.