DECAY OF LASER-INDUCED EXCITATIONS OF F-CENTERS.
Abstract
A strong population of excited F-center states is achieved in various alkali halides using a short intense pulse of a Q-switched Ruby laser. During the presence of the excited F-centers the time dependence of their decay is measured with a fast-recording spectrometer. This is done by monitoring the absorption changes connected with the ground state or excited state popula tions. Using this method for crystals containing low F-center concentrations the lifetime of the excited state of F-centers in KI, RbI, CsI, RbBr and CsF is measured from 7K to about 80K by monitoring absorption changes in the region of the beta-, the beta-* and the F-band, respectively. For KI samples containing high F-center concentrations it is found that the decay curves are nonexponential. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 30, 1965
- Accession Number
- AD0619072
Entities
People
- Dietmar Frohlich
- Herbert Mahr
Organizations
- Cornell University