Fine Structure Due to Refraction Effect in Electron Diffraction Pattern of Powder Sample

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概要

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• Fine structures due to refraction effect in electron diffraction patterns of cubic magnesium and cadmium oxides are studied when the sample have a fibrous orientation around [001] axis and the electron incidence is nearly perpendicular to the axis. In the case of magnesium oxide, most of the reflexions split into doublets corresponding to the ordinary refraction effect due to a mean inner potential of about $15{\sim}16$ volts; (002) reflexion, however, splits into quartet corresponding to the double refraction effect, which was formerly pointed out by Sturkey, the separation of which is also in accordance with the theoretical expectation. The intensities of the two spots corresponding to a double refraction are found to be remarkably different; the spot of larger deviation is weaker than that of smaller deviation. In the.case of cadmium oxide, though the fine structures of the fibrous reflexion are less apparent than in the case of magnesium oxide, it is noted the fact that the (111) reflexion splits only into doublet showing anomalously small separation, although well separated quartet according to a large double refraction effect is expected. The doublet, however, is to be considered as the two inner spots of the quartet, while the outer two are inappreciably weak on account of a much exaggerated intensity difference between the doubly refracted electron rays than that of (002) for magnesium oxide.

• INSTITUTE OF PURE AND APPLIED PHYSICSの論文
• 1953-11-25

著者

• Honjo Goro

  Tokyo Institute Of Technology

• Honjo Goro

  Tokyo Institute of Technology, Oh-okayama, Tokyo

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• Fine Structure due to Refraction Effect in Electron Diffraction Pattern of Powder Sample Part II. Multiple Structures due to Double Refraction given by Randomly Oriented Smoke Particles of Magnesium and Cadmium Oxide
• Fine Structure Due to Refraction Effect in Electron Diffraction Pattern of Powder Sample

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