The 4p-4d Transitions of Y VI, VII, VIII, Zr VII, VIII, IX, Nb VIII, IX, X and Mo IX, X, XI

Abstract

On recordings made in the Physics Department of Lund University, we have identified 64, 65, 63 and 71 4p-4d transitions in Y VI, Zr VII, Nb VIII and Mo IX, respectively, establishing 23 levels of 4p34d in each case. In Y VII, Zr VIII, Nb IX and Mo X we have identified 54, 53, 48 and 57 4p-4d transitions, establishing 19 levels of 4p24d in each spectrum. The number of 4p-4d transitions identified in Y VIII, Zr IX, Nb X and Mo XI is 28, 27, 27 and 31; they establish all the 11 4p4d levels that can combine with the ground levels. In addition, two levels of 4s4p3 could be found from 4s-4p transitions.