影像科学与光化学 ›› 1994, Vol. 12 ›› Issue (1): 6-10.DOI: 10.7517/j.issn.1674-0475.1994.01.6

• 研究论文 • 上一篇    下一篇

外延AgCl/AgBr乳剂感光性能的研究

李晓玲, 周本茂   

  1. 中国科学院感光化学研究所, 北京 100101
  • 收稿日期:1992-12-09 修回日期:1993-05-11 出版日期:1994-02-20 发布日期:1994-02-20
  • 通讯作者: 周本茂

THE PHOTOGRAPHIC PROPERTY OF THE EPITAXIAL AgCl/AgBr EMULSION

LI Xiao-Lin, ZHOU BEN-MAO   

  1. Institute of Photographic Chemistry, Academia Sinica, Beijing 100101, P. R. China
  • Received:1992-12-09 Revised:1993-05-11 Online:1994-02-20 Published:1994-02-20

摘要: 制备系列AgCl/AgBr八面体外延乳剂,利用EDS-STEM技术对主体乳剂AgBr八面体上氯的分布进行了测定,结果表明随AgCl/AgBr外延乳剂中AgCl含量的增大,而其分布优势始终在AgBr八面体的顶角位置,其次在边。77K时,用375nm的激发光源对外延乳剂AgCl/AgBr样品进行激发,随外延乳剂中AgCl含量的提高,AgCl的发光谱带有增大的趋势,但其峰位置基本保持在510nm左右,AgBr在600nm.AgCl和AgBr的发光峰始终以分立的形式存在,没有混晶AgBrCl的宽谱带出现,外延乳剂AgCl/AgBr的感光度随AgCl含量的提高也有一定的变化规律,当AgCl含量较低时,有明显增感作用,而当AgCl含量过高时,外延乳剂的感光度降低,但灰雾也减小。

关键词: 外延乳剂, 氯分布, 低温荧光, 感光度

Abstract: A Series of epitaxial octahedral AgCl/AgBr emulsions have been prepared,and the chloride distributions of the epitaxial emulsion grains were measured by employing energydisperse spectroscopy-scanning transmissive electron microscopy(EDS-STEM).It wasfound that the prefered sites in AgCl growing on the host AgBr octahedral are alwaysthe corners,whatever the amount of AgCl is in the epitaxial AgCl/AgBr emulsion。The fluorescence of the AgCl became more abundant in increasing the ratio of AgCl to AgBr,while the emission wavelenthh maintained at 510 nm.The emission of AgBr appeared at 600 nm,no broad-band emission corresponding to AgBrCl was observed.The presenceof minor AgCl in the epitaxial AgCl/AgBr made the photographic sensitivity increasedapparently,nevertheless,high ratio of AgCl to AgBr led to the decrease of photographicsensitivity and fog.

Key words: epitaxial emulsion, chloride distribution, fluorescence photographic sensitivity