【作者】 张荣香； 张继县； 张伟； 李莉； 李晓苇；

【Author】 ZHANG Rongxiang ZHANG Jixian ZHANG Wei LI Liand LI Xiaowei(College of Physics Science & Technology, HeBei University, Baoding, Hebei, 071002.)

【机构】 河北大学物理科学与技术学院；

【摘要】 将减感染料加到光谱增感乳剂中是控制不同波段感光度的有效手段,但是有关减感机理一直以来尚有不同的解释.本文利用微波吸收相敏检测技术对纯增感,纯减感,和增感加减感之后的立方体AgCl乳剂进行了检测,获得了在光谱增感波段的自由光电子时间分辨谱,结果表明:对于增感加减感的乳剂,在光谱增感波段增感染料吸收光产生自由光电子之后,减感染料能够使得自由光电子数目变少,并且光电子的衰减变快,而对于纯减感的乳剂,光谱增感波段的自由光电子数目和衰减变化均不明显。更多还原

【Abstract】 It is an effective method for the control of sensitivity in different wavelength range that desensitizing dye is added to the spectral sensitized emulsion. But so far, there have been various explanations with the desensitization mechanism. In present paper, the free photoelectron time-resolved spectra are obtained by microwave absorption and dielectric spectrum detection technology for sensitized, desensitized, and sensitized plus desensitized AgCl emulsion. It is found that for the sensitized plus desensitized emulsion free photoelectrons can be made less by desensitizing dye after it is produced by sensitizing dye in spectral sensitizing wavelength range, and the decay of photoelectron is faster. But the changes of amount and decay of free photoelectron are both not evident for the desensitized emulsion.更多还原