The seventh spectrum of platinum (Pt VII): Analysis of the (5d4+5d3

Abstract

The spectrum of platinum was observed in the (300 to 2100) Å wavelength region. The (5d 4 + 5d 3 6s)-5d 3 6p transition array of six times ionized platinum, Pt VII, has been investigated and 759 spectral lines have been classified in the region of (337 to 1273) Å. The analysis has led to the determination of the 5d 4 , 5d 3 6s and 5d 3 6p configurations. All 34 theoretically possible 5d 4 levels, 35 of 38 possible 5d 3 6s levels and 108 of 110 possible 5d 3 6p levels have been established. The orthogonal operators technique was used to calculate the level structure and transition probabilities. The energy parameters have been determined by the least squares fit to the observed levels. Calculated transition probability and energy values, as well as LS-compositions obtained from the fitted parameters are presented.