Proton drip-line studies at HRIBF

Proton radioactivity studies performed at the Holifield Radioactive Ion Beam Facility (HRIBF) within the last few years are reviewed. The discovery of five new proton radioactivities 140 Ho , 141 m Ho , 145 Tm , 150 m Lu and 151 m Lu is presented together with a recent observation of fine structure in proton emission from 146 gs,m Tm . These proton emitters were produced by means of fusion-evaporation reactions and studied with the HRIBF Recoil Mass Separator and detection system based on a Double-sided Silicon Strip Detector. For 113 Cs and 151 Lu , the studies of level structure were extended beyond the proton-emitting states via the measurements with a clover array CLARION using Recoil Decay Tagging.