Accession Number:

AD0619072

Title:

DECAY OF LASER-INDUCED EXCITATIONS OF F-CENTERS.

Descriptive Note:

Technical rept.,

Corporate Author:

CORNELL UNIV ITHACA N Y MATERIALS SCIENCE CENTER

Personal Author(s):

Report Date:

1965-07-30

Pagination or Media Count:

25.0

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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE