Mass spectrometric determination of Rb fission yields from 3He and 4He induced fission of 238U and 232Th

Cumulative and independent fission yields of Rb isotopes have been measured for 3He and 4He induced fission of 232Th and 238U at bombarding energies slightly above the Coulomb barriers. The on-line mass spectrometric technique provided yields for masses 89–97. Mean masses and widths of the Rb independent yield distributions were obtained and were compared to other fissioning systems with excitation energies up to 160 MeV.