title: The Spectrum of Doubly Ionized Tungsten (W III).
abstract: The spectrum of doubly ionized tungsten (W III) was produced in a sliding-spark discharge and recorded photographically on the NIST 10.7-m normal-incidence vacuum spectrograph in the 600-2680 Å spectral region. The analysis has led to the establishment of 71 levels of the interacting 5d4, 5d36sand 5d26s2even configurations and 164 levels of the interacting 5d36pand 5d26s6podd ones. A total of 2636 lines have been classified as transitions between the 235 experimentally determined levels. Comparison between the observed levels and those calculated from matrix diagonalizations with least-squares fitted parameters shows an rms deviation of ±87 cm-1for the even configurations and ±450 cm-1for the odd ones.
authors.affiliation: Instituto de Optica, Serrano 121. 28006-Madrid ( Spain ).
authors.forename: L
authors.initials: L
authors.lastname: Iglesias
authors.affiliation: Instituto de Optica, Serrano 121. 28006-Madrid ( Spain ).
authors.forename: M I
authors.initials: MI
authors.lastname: Cabeza
authors.affiliation: Instituto de Optica, Serrano 121. 28006-Madrid ( Spain ).
authors.forename: F R
authors.initials: FR
authors.lastname: Rico
authors.affiliation: Instituto de Optica, Serrano 121. 28006-Madrid ( Spain ).
authors.forename: O
authors.initials: O
authors.lastname: Garcia-Riquelme
authors.affiliation: National Institute of Standards and Technology, Gaithersburg, MD 20899.
authors.forename: V
authors.initials: V
authors.lastname: Kaufman
keywords: energy levels; parameters; spectra; tungsten; wavelengths