论文信息 - Temporary Bleaching of Color Centers in KCl Crystal

Temporary Bleaching of Color Centers in KCl Crystal

Complex color centers of M , R and N in KCl crystal are found to be temporarily bleached under an intense auxiliary F -light illumination. The generations of M ', R ' and N ' centers consisting of complex centers and one more electron are suggested. The thermal stabilities of these F '-type centers are also investigated. In KCl crystals containing only F centers, F ' centers decay thermally by the bimolecular process and the electron trapping cross section of a negative ion vacancy is found to be twice that of F center at near -70°C.

M. Ueta | M. Ikezawa | M. Hirai

[1] M. Ueta,et al. F'-type New Bands Associated with R, M and N Centers in Alkali Halide Crystals , 1962 .

[2] T. Kojima,et al. Structure and Properties of A-Centers in KCl , 1961 .

[3] A. B. Scott,et al. Decrease of F-Center Photoconductivity Upon Bleaching , 1960 .

[4] T. Tomiki. Photo- and Thermochemical Reactions in Potassium Chloride Crystals– A Quantitative Study of the M Centre– , 1960 .

[5] H. Pick. Farbzentren-Assoziate in Alkalihalogeniden , 1960 .

[6] C. C. Klick,et al. Some Low-Temperature Properties of the R, M, and N Centers in KCl and NaCl , 1958 .

[7] W. D. Compton,et al. Luminescence and Symmetry Properties of Color Centers , 1957 .

[8] M. Wallis,et al. Intensities of the R 1 and R 2 Bands in KCl Crystals , 1956 .

[9] F. Seitz. Color Centers in Alkali Halide Crystals. II , 1954 .

[10] J. J. Markham,et al. Bleaching Properties ofFCenters in KBr at 5°K , 1953 .

[11] S. Petroff. Photochemische Beobachtungen an KCl-Kristallen , 1950 .

[12] H. Pick. Über den Einfluß der Temperatur auf die Erregung von Farbzentren , 1938 .