Stabilized F/sup +//sub 2/ centers and radiochemical transformations of oxygen centers in Lif:O, OH and NaF:O, OH crystals

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Opt. Spectrosc. (Engl. Transl.); (United States)

OSTI ID:7200456

Lobanov, B D; Maksimova, N T; Isyanova, E D; Lomasov, V N; Provorov, A M; Tsirulnik, P N

The characteristics of the processes of radiolysis of anionic impurity defects and of formation of F/sup +//sub 2/ centers in LiF and NaF crystals have been studied. It was found that a necessary condition for the formation of stabilized O/sup - -/F/sup +//sub 2/ centers is the presence in the crystals of two types of impurities: OH/sup -/ ions and oxygen. Two steps were observed in the process of formation of O/sup - -/F/sup +//sub 2/ centers: a fast step involving diffusion of thermally unstable F/sup +//sub 2/ centers, and a slow step involving diffusion of single O/sup - -/V/sup +//sub a/ dipoles. The mechanisms of formation of O/sup - -/F/sup +//sub 2/ centers in both steps are discussed. It was found that in LiF:O, OH and NaF:O, OH, radiochemical transformations of impurity defects take place which do not occur in crystals containing one of the impurities. Such reactions are manifested in the formation of O/sub m/H/sub n/ groups. A mechanism of their formation is proposed.

• Research Organization: Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, P.O. Box 150, Cheongryang, Seoul, Korea
• OSTI ID: 7200456
• Journal Information: Opt. Spectrosc. (Engl. Transl.); (United States), Journal Name: Opt. Spectrosc. (Engl. Transl.); (United States) Vol. 63:4; ISSN OPSUA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ABSORPTION SPECTRA
ALKALI METAL COMPOUNDS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DECOMPOSITION
F CENTERS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
POINT DEFECTS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIOLYSIS
SODIUM COMPOUNDS
SODIUM FLUORIDES
SPECTRA
VACANCIES