Lowest lying 2_s16 and 3- states of Z-even N=50 isotones in relativistic quasiparticle random phase approximation

Abstract

We have studied the variation of the excitation energy, electric multipole decay rate and g factor of the lowest lying 2_s16 and 3_s13_s178722_s19 states of even-Z N = 50 isotones as a function of the mass number in relativistic quasiparticle random phase approximation. Overall agreement with the available data is quite satisfactory considering the wide range of the number of nuclei and their excitation properties in a microscopic approach having no free adjustable parameter. Also predictions are made for several nuclei. We find that increase in the pairing interaction strength in general improves the agreement with the data for 3_s13_s178722_s19 states but it affects adversely the results for the 2_s16 states.