Fundamental configurations of doubly-ionized molybdenum (Mo III)

The spectrum of doubly ionized molybdenum (Mo III) was produced in a sliding-spark discharge and recorded photographically in the 1100-3250 A 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 4d35s even configurations and 65 levels of the 4d35p 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. (orig.)