GRAIN-SIZE DEPENDENCE OF PHOTOCHARGE EFFECT IN SILVER IODOBROMIDE PHOTOGRAPHIC-EMULSIONS

被引：0
作者：
ZOU, CF
SAHYUN, MRV
MUELLER, ME
LEVY, B
ZHANG, TG
机构：
[1] THREE M CO,THREE M CTR,CORP RES,ANALYT & PROPERTIES RES LAB,ST PAUL,MN 55144
[2] BOSTON UNIV,DEPT CHEM,BOSTON,MA 02215
来源：
JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY | 1995年 / 39卷 / 02期
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中图分类号：
TB8 [摄影技术];
学科分类号：
0804 ;
摘要：
Time-resolved photocharge decay studies have been carried out on chemically sensitized gelatino-Ag(I)Br emulsion coatings with Ag(I)Br grain size as the principal variable. Films were characterized optically and sensitometrically. Variation in both maximum photocharge amplitude and photographic speed (intrinsic) among these films reflects primarily variation in optical absorption characteristics dependent on Ag(I)Br grain size. We observe positive photocharge signals and assign them to photoelectrons; accordingly, more carriers are generated at grain faces away from the exposing light than on directly illuminated faces. Maximum positive photocharge amplitude, normalized for the fraction of incident, light absorbed, correlates with both grain size and photographic speed.
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页码：106 / 112
页数：7
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