Accession Number:

AD0672692

Title:

PHOTOCHEMICAL CONVERSION OF COLOR CENTERS IN HEATED CRYSTALS OF POTASSIUM CHLORIDE (O FOTOKHIMICHESKOM PREVRASHCHENII KRASYASHCHIKH TSENTROV V NAGRETYKH KRISTALLAKH KHLORISTOGO KALIYA),

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

• Shatalov,A. A.

Report Date:

1967-10-19

Pagination or Media Count:

16.0

Abstract:

Exposition of the results of an investigation into the photochemical conversion of F-centers in KCl crystals at temperatures 270-300C, which leads to the complete disappearance of the F-band of absorption and to its substitution by a very similar new symmetric bell-shaped band X-band displaced about 0.5 ev toward the long-wavelength side. For lower temperatures 250-150C the light action also leads to complete disruption of the F-band with its substitution by wider and lower symmetrical bands of absorption displaced somewhat still more toward the side of long wavelengths. The temperature dependence of the absorption X-band is characterized by its enhancement, contraction, and insignificant displacement toward the short-wavelength side during cooling. The author presents preliminary results of the measurement of the kinetics governing the process of photochemical conversion of F-centers for various temperatures, and expresses an assumption concerning the connection between observed thermophotochemical conversions of F-centers and the process of formation of colloids of the alkali metal. He states the possible mechanism governing the conversion of F-centers into F2-centers under the action of light. Author

Descriptors:

• (*CRYSTALLOGRAPHY
• POTASSIUM COMPOUNDS)
• CRYSTAL LATTICES
• PHOTOCHEMICAL REACTIONS
• X RAY ABSORPTION ANALYSIS
• USSR

Subject Categories:

• Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE