Accession Number:

ADA282827

Title:

Laser Spectroscopy of Gdo: Ligand Field Assignments of 4f7(8S)6p Reversing 4f7(8)6s Transitions

Descriptive Note:

Corporate Author:

EMORY UNIV ATLANTA GA

Report Date:

1994-01-01

Pagination or Media Count:

12.0

Abstract:

Wavelength-resolved fluorescence excitation techniques have been used to record three electronic transitions of GdO at a resolution of 0.03cm1. Previous analyses of two bands have been extended with some corrections to the assignments of low-J lines. Improved molecular constants were obtained for the X9sigma- and a7sigma- states that correlate with Gd24f78S6s02-. A large difference between the spin-orbit coupling constants for X9Sigma-Lambda -0.10353cmand a7Sigma-Lambda 0.64712cm was noted. This difference was ascribed to the fact that the X state is almost pure f78S, whereas the a state has partial f76P character. Analysis of the a state required off- diagonal matrix elements of the spin-orbit interaction, evaluated using sixth- order degenerate perturbation theory, for treatment of non-rotating molecule spin-orbit intervals. In principle, these elements are needed to describe Sigma states of septet and higher multiplicity. Energy intervals reflecting the structure Gd24f78S6p02- were recognized among the excited states of GdO. Overall, the results were consistent with ligand field theory models for the excited states of lanthanide oxide LnO molecules

Subject Categories:

  • Inorganic Chemistry
  • Atomic and Molecular Physics and Spectroscopy
  • Optics
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE