Intensity of Fast Electrons Transmitted through Thick Single Crystals
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概要
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It is shown theoretically that the intensity of diffuse background in electron diffraction patterns is mainly contributed from the multiple thermal scattering. At room temperature the intensity distribution in most cases in nearly the same as that of the multiple elastic scattering in amorphous materials. The theory is confirmed at accelerating voltages 100, 200 and 450kV by measurements of intensities transmitted through silver single crystals of thicknesses from 0.05μm to 1.2μm. The mean and anomalous absorption coefficients measured at the (220) Bragg position at room temperature are μ_0=2.9×10^<-3>/Å and μ_<220>=1.5×10^<-3>/Å at 100kV, and μ_0=1.4×10^<-3>/Å and μ_<220>=0.8×10^<-3>/Å at 450kV. These results are in good agreement with the theoretical values in literatures. The maximum observable thickness for images of crystal imperfections is also calculated for some crystals, and the results are compared with experimental results.
- 社団法人日本物理学会の論文
- 1973-07-05
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