Low Temperature Luminescence of Silver Bromide Emulsions and the Mechanisms of Sulfur and Gold Sensitizations

Abstract

By use of the emulsions composed of innert gelatin and octahedral or cubic silver bromide grains (about O.7pt), effects of sulfur and gold sens, itizations have been examined on the emission processes at liquid N2 temperature and photographic processes of the silver bromide grains. Both sulfur and geld sensitizations increased the photographic speeds, and decreased the emission intensities of both octahedral and cubic grains. This result has been interpreted by the view that both sulfur and gold sensitizations provide electron traps at the grain surfaces.