ESR AND OPTICAL ABSORPTION STUDIES OF TRANSITION METAL IONS AND COLOR CENTERS IN GLASS
Abstract
The theory of zero field ESR measurements of an S = 3/2 system is considered, including spectrometer considerations. A brief discussion of an experimental problem associated with temperature dependent ESR intensity measurements of broad powder spectra is included along with a proposed solution. The optical absorption and ESR spectra of Mo(5+) and Cu(2+) in glass, in the concentration range 0.1-16.0 wt. % MoO3 and CuO, respectively, were investigated. In both cases, the ESR spectra are round to be concentration dependent. For isolated Cu(2+), the axial spin Hamiltonian parameters obtained are: g parallel to = 2.335 plus or minus 0.002, g perpendicular to = 2.050 plus or minus 0.001, A parallel to = 155 plus or minus 1 x 0.0001/cm, and A perpendicular to = 22.7 plus or minus 0.1 x 0.0001/cm. ESR and optical absorption spectra of Mo(3+) in a phosphate glass are shown. The value of the crystal field splitting parameter delta is 22,000/cm, about 52% greater than the value of 14,500/cm for isoelectronic Cr(3+) in the same base glass. The spin resonance spectra of Cr(3+) and Mo(3+) are compared, from which it is concluded that they are similarly accommodated in the glass. Their local environments appear to be identical. A technique is described which allows for a precise determination of the activation spectrum for production of permanent color center defects by ultraviolet light.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1967
- Accession Number
- AD0654576
Entities
People
- Joseph T. Fournier
- Robert J. Landry