光生电子和由还原剂提供的电子在卤化银颗粒中性能的比较

A COMPARISON BETWEEN THE BEHAVIOR OF THE LIGHT INDUCED ELECTRON AND REDUCING AGENT ELECTRON IN THE SILVER HALIDE GRAINS

本文研究了光生电子和还原剂提供的电子在卤化银晶体中的行为．光灰化和还原剂灰化生成的灰雾中心的位置不同．光灰化时灰雾中心优先在卤化银颗粒内部形成，表明光生电子可以直接进入卤化银晶体的导带．还原灰化时内部灰雾中心只有在灰化剂量足够多时才形成，而且滞后于表面灰雾中心的形成，表明还原剂提供的电子虽然可以进入卤化银的导带，但它们进入导带的方式与光生电子不同．

The behavior of the light induced electron and the reducing agent electron in direct positive emulsions was studied. The locations of the fog centers preferably formed in the grain introduced by light are different from those introduced by reducing agents. When photofogged the fog centers are formed in the interior of the grain first indicating that the light induced electrons can enter the conduction band directly. Wherease, when fogged by reducting agents, the internal fog centers are formed only when the quantity of reducing agent is sufficient and after the formation of surface centers. In above two cases the ways in which electrons enter the conduction band of silver halide are different.