Laser Spectroscopy of Gdo: Ligand Field Assignments of 4f7(8S)6p Reversing 4f7(8)6s Transitions
Abstract
Wavelength-resolved fluorescence excitation techniques have been used to record three electronic transitions of GdO at a resolution of 0.03/cm1. 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 X9(sigma)- and a7(sigma)- states that correlate with Gd2+(4f7((8S)6s)02-. A large difference between the spin-orbit coupling constants for X9(Sigma)-(Lambda = -0.10353/cm)and a7(Sigma)-(Lambda = 0.64712/cm) was noted. This difference was ascribed to the fact that the X state is almost pure f7((8S), whereas the a state has partial f7(6P) 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 Gd2+(4f7((8S)6p)02- 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
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1994
- Accession Number
- ADA282827
Entities
People
- Leonid A. Kaledin
- Matthew G. Erickson
- Michael C Heaven
Organizations
- Emory University