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菊池线是研究晶体结构的一种重要的信息,在电子衍射分析工作中有着广泛的应用。例如,对一些晶体学问题,我们经常需要求出晶体相对于电子束的方向,在薄膜晶体电子显微术中一般称为晶膜的法线方向,这也就是电子束入射的反方向,用菊池线可精确地测出这一方向。但由于解算过程烦琐复杂,给具体分析工作带来许多困难。而借助于T1-59计算器将使问题大为简化。 1 三菊池极法确定晶体相对电子束的方向:如图1所示,在给定的菊池花样中,当找到不属于同一晶带的三个点阵平面给出的菊池线对、标定了这三个线对指数h_ik_il_i(i=1,2,3)后,就能由此确定它们中线交点所代表的晶带轴(?)。令电子入射方向为(?),则(?)。
Kikuchi line is an important information for the study of crystal structure and has been widely used in the work of electron diffraction analysis. For example, for some crystallographic problems, we often need to find the direction of the crystal with respect to the electron beam, which is generally referred to as the normal direction of the crystal film in thin-film crystal electron microscopy, which is the opposite of the electron beam incident, Kikuchi line can be accurately measured in this direction. However, due to the complexity of the solution process, many difficulties are brought to the specific analysis. With the help of the T1-59 calculator, the problem will be greatly simplified. 1 Three kikuchi pole method to determine the crystal relative to the electron beam direction: As shown in Figure 1, in a given kikuchi pattern, when the kikuchi line pairs given by the three lattice planes that do not belong to the same crystal zone are found, After the three line pair indices h_ik_il_i (i = 1, 2, 3), we can determine the axis of the belt axis (?) Represented by the intersection of their center lines. Let the electron incident direction (?), Then (?).