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首页> 外文期刊>Journal of Imaging Science and Technology >Characterization of various development centers in silver halide photography
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Characterization of various development centers in silver halide photography

机译：卤化银摄影中各个开发中心的特征

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In order to collectively study the factors influencing the developability of centers, the in situ measurement and analysis of the rate of development was made for various latent image centers and fog centers on AgBr grains with a variation of the kind of chemical sensitizations. The developability of these centers was analyzed from the viewpoints that the electron transfer from a developer to the electron-accepting level of a center should initiate the development, and that the height of the electron-accepting level of a center should be related to its size, chemical composition, band structure, the parity of the number of valence electrons in it, and the site for its formation. It was confirmed that the smallest developable center in AgBr emulsions was a fog center composed of two Au atoms while the smallest latent image centers in the emulsions with and without gold sensitization were Ag2Au and Ag-4, respectively. The develop-abilities of these smallest centers were much smaller than those of larger ones. The developability of a center with a forbidden band as exemplified by Ag2S (i.e., a fog center in a sulfur sensitized emulsion) was so small that several hundreds of nanoclusters per grain were needed to initiate the development of the grain. (C) 2006 Society for Imaging Science and Technology.
机译：为了集体研究影响中心显影性的因素，对AgBr晶粒上各种潜像中心和雾中心的显影速率进行了原位测量和分析，并改变了化学敏化的种类。从中心从显影剂向中心的电子接受能级的电子转移应引发显影，中心的电子接受能级的高度与其大小有关的观点分析了这些中心的可显影性。 ，化学组成，能带结构，其中价电子数量的奇偶性及其形成部位。证实了在AgBr乳剂中最小的可显影中心是由两个Au原子组成的雾中心，而在具有和不具有金敏化的乳剂中最小的潜像中心分别是Ag 2 Au和Ag-4。这些最小的中心的发展能力远小于较大的中心。以Ag 2 S为例的具有禁带的中心的可显影性（即，硫致敏乳剂中的雾中心）是如此之小，以至于每个颗粒需要数百个纳米团簇来引发颗粒的生长。 （C）2006年影像科学与技术学会。

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