Photoconductivity and Luminescence of the F and M Centers in Potassium Chloride

Abstract

The photoconductivity and luminescence of additively colored KCl crystals by excitation with light in the F band were measured at room temperature as a function of the M center concentration. With the growth of the M band, the photocurrent decreased, while the emission intensity increased. This result would suggest that for a crystal containing M centers the photoconductivity due to the F center and the luminescence due to the M center are the competing processes in the excited state of F centers.