In-beam study of Sn-102

Excited states in Sn-102 have been identified for the first time, in an in-beam gamma-ray spectroscopic experiment. Two gamma-ray transitions with energies 1472 and 497 keV following the decay of the seniority 6(+) isomer with t(1/2) = 1.0(5) mu s were unambiguously assigned to Sn-102. Due to the very low cross section of about 2 mu b for producing Sn-102 in the reaction Cr-50(Ni-58,1 alpha 2n), a highly selective detector setup utilizing NORDBALL ancillary detectors and a recoil catcher device was used. High gamma-ray detection efficiency was achieved with two EUROBALL Ge cluster detectors.
NR 2015