Fundamental configurations of doubly-ionized molybdenum (Mo III)

Abstract

The spectrum of doubly ionized molybdenum (Mo III) was produced in a sliding-spark discharge and recorded photographically in the 1100-3250 Å spectral region using the NBS 10.7-m normal-incidence vacuum spectrograph. The level system was revised and extended to include 54 levels of the 4d4 and 4d3 5s even configurations and 65 levels of the 4d3 5p odd configuration. A total of 679 lines have been classified as transitions between these levels. The observed level system was interpreted by means of relativistic Hartree-Fock calculations and least-squares parametric fits.