The spectrum of doubly ionized tungsten (W-III)

Abstract

The spectrum of doubly ionized tungsten (W III) was produced in a slidingspark discharge and recorded photographically on the NIST 10.7-m normal-incidence vacuum spectrograph in the 600-2680 A spectral region. The analysis has led to the establishment of 71 levels of the interacting 5d*, 5d^ 6i! and iiP-6s^ even configurations and 164 levels of the interacting 5d^ dp and 5d^ 6s6p odd ones. A total of 2636 lines have been classified as transitions between the 235 experimentally determined levels. Com-parison between the observed levels and those calculated from matrix diagonalizations with least-squares fitted parameters shows an rms deviation of 87 cm~' for the even configurations and 450 cm"' for the odd ones.