Studies of nuclei at and beyond the proton drip-line with stable and radioactive beams at HRIBF

Investigations of nuclei in the proton drip-line region performed at the Holifield Radioactive Ion Beam Facility (HRIBF) within the last two years are reviewed. In particular, the discovery of five new proton radioactivities ¹⁴⁰Ho, ^141mHo, ¹⁴⁵Tm, ^150mLu and ^151mLu is discussed. These proton emitters were produced by means of fusion-evaporation reactions and studied with a Recoil Mass Separator and a Double-sided Silicon Strip Detector. For ¹¹³Cs and ¹⁵¹Lu, the studies of level structure were extended beyond the proton-emitting states via the measurements with a clover array CLARION using Recoil Decay Tagging. The plan to use a fusion-evaporation reaction with a radioactive ⁶⁹As beam developed at HRIBF, in order to study the decay of a new beta-delayed proton emitter ¹²⁵Nd, is also described.