OPTICAL AND ELECTRON SPIN RESONANCE STUDIES OF THE ICL(-)V-K CENTER IN KCL:I.
Abstract
The ICl(-)V-K center, a <110>-oriented self-trapped hole center, was investigated in X-irradiated KCl:I and KCl:I:Pb at low temperatures by optical and electron spin resonance techniques. Three optical transitions are identified at 430, 840, and 1000 nm by anisotropic absorption measurements; their observed sigma polarizations and relative intensities are consistent with a molecular-orbital model modified for XY(-) molecule-ion centers. Pulse annealing experiments monitored by ESR and correlated with thermoluminescence data and absorption spectrum changes give information on the formation and thermal stability of ICl(-). An improved analysis of the ESR spectrum has been carried out taking into account deviations from axial symmetry. Calculations of the large iodine quadrupole interaction are extended to second-order perturbation theory, and observed forbidden transitions are fitted to these equations, allowing a determination of the sign, as well as the magnitude, of the quadrupole interaction. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 29, 1968
- Accession Number
- AD0665980
Entities
People
- Lawrence S. Goldberg
- Marvin L. Meistrich
Organizations
- Cornell University