Two-proton emission half-lives in the effective liquid drop model

Abstract Half-life for two-proton radioactivity of emitter nuclides of mass number A 70 has been calculated by using a phenomenological, effective liquid drop model ( eldm ) which has been applied successfully to one-proton radioactivity, alpha decay, cluster radioactivity and cold fission processes. Following this approach, we estimate half-life values for several 2 p -emitted nuclides and compare our results with predictions from other models, as well as the existing data in the literature, specifically the cases for 16 Ne, 19 Mg, 45 Fe, 48 Ni, 54 Zn and 67 Kr parent nuclei. It is seen that the eldm version adapted to deal with 2 p -decay process reproduces the available experimental data quite satisfactorily, asserting that shell corrections and pairing effects for the ground state nucleus have been well incorporated into the model via the experimental mass excess values. The present estimates for half-lives show a number of nuclei with detectable 2 p -emission mode, which predictions may serve as indicators for further experimental investigations.