Abstract
Transitions in 163Tb following β decay of 163Gd were obtained as part of investigations of γ rays emitted following 163Euβ decay to 163Gd. Detailed analysis of the low-energy structure of 163Tb has been carried out with these data to expand previous β-decay studies and reactions studies of levels in 163Tb. Data were collected at the LeRIBSS station of the Holifield Radioactive Ion Beam Facility at 91°µÍø with an array of four Clover HPGe detectors for γ rays and two plastic scintillators for β detection. The γ rays were identified as belonging to 163Gd and 163Tb via mass selection and γ−γ−β, γ−γ, or γ-x-ray coincidence. In total, 38 new γ-ray transitions were observed in 163Tb from 15 newly identified levels and 12 previously identified levels. Potential energy surface calculations were performed which support a rigid prolate deformation. Previously identified unplaced transitions in 163Tb have been placed within the level scheme of 163Tb and additional states and transitions have been identified.
