Theory of Transmission Coefficient of X-Rays Evanescent Wave for Grazing Incidence

概要

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The nature of transmission coefficient l'Z'(J)l' of X-ray evanescent wave, x (= 0/0.) beingnormalized angle, for grazing incidence around the total external reflection angle is discussed.Refractive index n of X-ray is expressed by n : l - (5 - i = f3. A new equation which explainsexactly the peak position x. of the function ?T(x)?' is presented. The value of x: is given as asolution of a cubic equation 4g' -F 37g' -A- 67g -l- (4')/ - l)'y : 0, with 7 : (p/6)' and g = l - x%.According to the equatuon, with increasing values of f3/b, the peak position .I'. shifts to lowerangle at first and increase again qtrickly. The peak heights IT(l.)l' are also calculated. Thenature of the cubic equation is investigated in details. The shapes of ?T(x)?' are comparedwith the experimental values of an exit angle dependence of X-ray emission which are rneasuredduring RHEED observation.
社団法人日本物理学会の論文
1996-10-15