An electron spin resonance investigation of photographic processes in crystals of AgCl containing traces of CuCl

Abstract

An electron spin resonance spectrum, due to the formation of cupric ions during illumination, has been observed in crystals of silver chloride containing 0–1 mol %, of cuprous chloride, which have been quenched to−183[ddot]c immediately following irradiation. The spectrum fades rapidly if the crystals are kept at any temperature above −140[ddot]c after the end of illumination. An interpretation of this behaviour is given which is based upon the Mitchell theory of the photochemical process in crystals of silver halides.