FERRARI, C., F. GERMINI, D. KORYTÁR, Petr MIKULÍK and L. PEVERINI. X-ray diffracted intensity for double-reflection channel-cut Ge monochromators at extremely asymmetric diffraction conditions. Journal of Applied Crystallography. 2011, vol. 44, No 44, p. 353-358. ISSN 0021-8898. Available from: https://dx.doi.org/10.1107/S0021889811001439. |
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@article{964880, author = {Ferrari, C. and Germini, F. and Korytár, D. and Mikulík, Petr and Peverini, L.}, article_number = {44}, doi = {http://dx.doi.org/10.1107/S0021889811001439}, keywords = {X-ray diffraction; X-ray optics; Monochromators}, language = {eng}, issn = {0021-8898}, journal = {Journal of Applied Crystallography}, title = {X-ray diffracted intensity for double-reflection channel-cut Ge monochromators at extremely asymmetric diffraction conditions}, url = {http://scripts.iucr.org/cgi-bin/paper?S0021889811001439}, volume = {44}, year = {2011} }
TY - JOUR ID - 964880 AU - Ferrari, C. - Germini, F. - Korytár, D. - Mikulík, Petr - Peverini, L. PY - 2011 TI - X-ray diffracted intensity for double-reflection channel-cut Ge monochromators at extremely asymmetric diffraction conditions JF - Journal of Applied Crystallography VL - 44 IS - 44 SP - 353-358 EP - 353-358 SN - 00218898 KW - X-ray diffraction KW - X-ray optics KW - Monochromators UR - http://scripts.iucr.org/cgi-bin/paper?S0021889811001439 L2 - http://scripts.iucr.org/cgi-bin/paper?S0021889811001439 N2 - The width and integrated intensity of the 220 X-ray double-diffraction profile and the shift of the Bragg condition due to refraction have been measured in a channel-cut Ge crystal in an angular range near the critical angle of total external reflection. The Bragg angle and incidence condition were varied by changing the X-ray energy. In agreement with the extended dynamical theory of X-ray diffraction, the integrated intensity of the double diffraction remained almost constant, even for the grazing-incidence condition very close to the critical angle for total external reflection. A broadening of the diffraction profile not predicted by the extended theory of X-ray diffraction was observed when the Bragg condition was at angles of incidence lower than 0.6 deg. Plane wave topographs revealed a contrast that could be explained by a slight residual crystal surface undulation of 0.3 deg due to etching to remove the cutting damage and the increasing effect of refraction at small glancing angles. ER -
FERRARI, C., F. GERMINI, D. KORYTÁR, Petr MIKULÍK and L. PEVERINI. X-ray diffracted intensity for double-reflection channel-cut Ge monochromators at extremely asymmetric diffraction conditions. \textit{Journal of Applied Crystallography}. 2011, vol.~44, No~44, p.~353-358. ISSN~0021-8898. Available from: https://dx.doi.org/10.1107/S0021889811001439.
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