OSCILLATOR STRENGTHS OF F AND M CENTERS IN POTASSIUM CHLORIDE,
Abstract
The optical absorption coefficients and the half-widths of the F and M bands were measured at room temperature in additively colored KCl in which the relative proportions of the color centers were varied by room temperature F-light irradiation. Care was taken to reduce the concentrations of higher aggregate centers by suitable annealing. In interpreting the results, the F center was considered to be a negative ion vacancy with an associated electron and the M center, a pair of F centers in nearest neighbor <110> positions. The slope of the alpha-F vs. alpha-M curve yielded an average value of the ratio of the M- and F-center oscillator strengths, fM/fF = 0.43, in agreement with other measurements. The oscillator strength is the probability of occurrence of the color center optical transition responsible for the absorption peak. An attempt to obtain an absolute value of the F-center oscillator strength by comparing pH and optical measurements is described. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- AD0667972
Entities
People
- Michael A. Shields