Investigation of proton radioactivity with the effective liquid drop model**Supported by National Natural Science Foundation of China (11247001), Natural Science Foundation of the Higher Education Institutions of Anhui Province, China (KJ2012A083, KJ2013Z066) and Anhui Provincial Natural Science Foundation (1408085MA05)

Abstract

Proton radioactivity has been investigated using the effective liquid drop model with varying mass asymmetry shapes and effective inertial coefficients. An effective nuclear radius constant formula replaces the old empirical one in the calculations. The theoretical half-lives are in good agreement with the available experimental data. All the deviations between the calculated logarithmic half-lives and the experimental values are less than 0.8. The root-mean-square (rms) deviation is 0.523. Predictions for the half-lives of proton radioactivity are made for elements across the periodic table. From the theoretical results, there are 11 candidate nuclei for proton radioactivity in the region Z<51. In the region Z>83, no nuclei are suggested as probable candidate nuclei for proton radioactivity within the selected range of half-lives studied.