Beam-foil spectroscopy of Se IV, V, and VI

Abstract

Six new transitions are assigned in Se V, resulting in the classification of three new levels: 4s4d1D, 4s5s1S, and 4s5p1P0. Lifetimes and multiplet f-values are presented for the 4s24d2D, 4s4p22P, 4s4p22S, and 4s4p22D terms of Se IV, the 4s5s3S, 4s4d3D, 4s4d and 4p21D, 4s4p1P0, and 4p23P terms of Se V and the 5s2S, 4d2D, and 4p2P0 terms of Se VI. The cascade repopulation problems were analyzed by using the ANDC method on the terms 4s4p1P0 of Se V and 4p2P0 of Se VI.