Optical Spectra of Yb(3+) in Crystals with Scheelite Structure. I. Explanation of the Spectra.
Abstract
The optical and Zeeman spectra are reported for Yb(3+) in nine single crystals of the Scheelite family at temperatures varying between 1.9 and 300 K and impurity ion concentration varying between 0.05 and 4 percent. The scheelite crystals examined were CaWO4, CaMoO4, SrWO4, SrMoO4, PbWO4, PbM0O4, CdMoO4, BaWO4, and LiYF4. The Yb(3+) ion substitutes for the cation and experiences a crystalline electric field of S4 point symmetry. The spectra were found to be highly structured containing the S4 electronic transitions, concentration dependent lines originating from low symmetry sites caused by lattice defects, and features tentatively identified as vibronic transitions. Vibronic selection rules for Yb(3+) in scheelite, which belongs to the C(6)4h space group, have been calculated. Identification of the S4 spectral lines allowed the energy level schemes for Yb(3+) in the nine scheelites to be determined. (author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1980
- Accession Number
- ADA091252
Entities
People
- Edward A. Brown
Organizations
- Harry Diamond Laboratories