溴化银乳剂中Ag2掺杂的位置效应研究

使用微机控制的双注仪，在晶体生长过程的不同时刻，加入一定浓度的二甲基胺硼烷（DMAB），制得了一系列Ag2处于不同掺杂位置的立方体溴化银微晶乳剂．对这些乳剂感光性能的研究表明：1）他掺杂乳剂与未掺杂乳剂相比，感光度有显著提高；2）心掺杂乳剂可同时与常规的硫加金化学增感和光谱增感进行协同增感；3）心掺杂接近微晶表面时乳剂感光度的增幅最大；4）在本实验条件下，掺杂乳剂的灰雾均保持在较低的水平。

Position Effect of Ag2 Doped in Cubic Silver Bromide Emulsions

In the emulsifying process of silver bromide microcrystals in the double-jet apparatus controlled by a microcomputer, a specific quantity of DMAB was added at different time when the crystal growth to obtain a series of cubic AgBr emulsions in which Ag_2 were doped into different depths of AgBr microcrystals. The results from determination of photographic properties of these emulsions showed: 1) that the sensitivities of Ag_2 doped emulsions, relative to that of the undoped emulsion as the controlled one, were remarkably increased; 2) that a significant cooperative sensitization of the internal doped silver dimmers with the surface sulfur-plus-gold and dye sensitizations was observed; 3) that the closer to the surface of grains the Ag_2 doped in AgBr grains was, and the greater the sensitivities of the doped emulsions were; 4) that fog densities of all emulsions doped by Ag_2, including those primitive, sensitized by sulfur-plus-gold and by green-sensitive dye, were kept in a reasonably low level.