Spectroscopic investigation of F, F2and F3+color centers in gamma irradiated lithium fluoride crystals
Year: 2010
Type: conference-paper
Abstract: Optical absorption and photoluminescence spectra were measured on gamma colored lithium fluoride crystals at five different irradiation doses. By accurate Gaussian best-fit procedures of the absorption measurements the peak intensity of F and M bands and the concentrations of F, F 2 and F 3 + color centers in gamma irradiated LiF crystals at different doses were obtained. A quadratic relationship between F and F 2 defect concentrations as a function of the irradiation dose was found. Photoluminescence measurements, excited by an Argon laser at 457.9 nm, were used to study the effect of the laser power on the F 2 and F 3 + emission spectra of gamma irradiated LiF crystals. The influence of the triplet state on the optical cicle of F 3 + color center was highlighted for several excitation laser power and the ratio of the transitions probability W 1 and W 2 to and from the triplet state was derived.
Language: English
Subfield: Radiation
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1967793045