Mean and Anomalous Absorption Coeficients of Electrons for Magnesium Oxide Single Crystal
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概要
- 論文の詳細を見る
Intensity profiles of electron microscopic images formed by elastically scattered electrons were analyzed for three different diffraction conditions: (1) The incident beam is parallel to the (100)-plane, (2) No Bragg reflection is excited and (3) (200) Bragg reflection is at the exact Bragg condition. Accelerating voltages were 50, 75 and 100 kV. Inelastically scattered electrons were eliminated by Ichinokawa's magnetic velocity analyzer. The absorption coefficients were determined by comparison of the observed intensity profiles with those calculated by the formulae of h00-six-beam approximation. The result showed that the mean absorption coefficient is μ_0=1.5×10^3Å^<-1>, and the anomalous absorption coefficient is μ_<200>=0.24×10^<-3>Å^<-1> at 100kV. Both of μ_0^<-1> and μ^<-1>_<200> were approximately proportional to the square of the electron velocity. Intensity profiles of ordinary images are explained by basis on the results for elastically scattered electrons.
- 社団法人応用物理学会の論文
- 1969-05-05
著者
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Ichimiya Ayahiko
Department Of Applied Physics Faculty Of Engineering Nagoya University
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Ichimiya Ayahiko
Department Of Physics Nagoya University:(present Address)department Of Applied Physics Faculty Of En
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