IDENTIFICATION OF MU-S-ISOMERS PRODUCED IN THE FRAGMENTATION OF A SN-112 BEAM

Decays of over forty short-lived (T-1/2 from approximate to 50 ns to 7 0 mu s) isomeric states including a new isomer As-66m produced in the fragmentation of a Sn-112 beam (58 A . MeV, 63 A . MeV) on a Ni-nat ta rget were observed at the final focus of the LISE3 spectrometer at GAN IL. Their detection, based on the slow (approximate to 10 mu s) time c orrelation of identified ions with the characteristic gamma-radiation, represents a novel method to search for new isomers and can be used f or unambiguous isotope identification for projectile fragment separato r experiments. Isomeric yields and isomer-to-total production ratios w ere determined.