Katz R, Pennington E C
Phys Med Biol. 1978 Nov;23(6):1115-23. doi: 10.1088/0031-9155/23/6/007.
Nuclear emulsions of the Ilford K series, exposed to X-rays from 15 to 150 kVp and systematically underdeveloped, exhibit supralinear blackness--exposure curves ranging from 1- to 4-hit in character, and whose shape is the same at all excitation voltages. Processing can be so adjusted that the curve shape is well represented by the alpha--beta model, and matches an experimental dose--response curve obtained with hamster cells after irradiation with gamma rays. The effective grain size of these emulsions is 1.3 micron when normalised to unit density material for comparison with the radiation sensitive elements of biological cells. With fractionated exposures, response curves which mimic Elkind recovery are produced.
伊尔福K系列核乳剂，经15至150 kVp的X射线照射并系统显影不足，呈现超线性黑化 - 曝光曲线，其特征为1至4次击中，且在所有激发电压下形状相同。显影过程可进行调整，使曲线形状能很好地由α-β模型表示，并与用仓鼠细胞经γ射线照射后得到的实验剂量 - 响应曲线相匹配。将这些乳剂归一化为单位密度材料时，其有效粒径为1.3微米，以便与生物细胞的辐射敏感元件进行比较。采用分次照射时，会产生模拟埃尔金德恢复的响应曲线。
