J. Phys. IV France 04 (1994) C9-449-C9-452
Kossel diffraction and X-ray standing waves : two birds of one featherTh. Gog, D. Novikov, J. Falta, A. Hille and G. Materlik
Hamburger Synchrotronstrahlungslabor HASYLAB am Deutschen Elektronen-Synchrotron DESY, 22603 Hamburg, Germany
By virtue of the optical reciprocity theorem, Bragg-case Kossel diffraction in perfect crystals can be viewed as the reverse process of x-ray standing waves (XSW) in the sense that the location of the source of radiation and the point of detection are merely interchanged between the two. A method can then be devised to determine atomic positions in a crystal lattice by analyzing the profile of angularly resolved Kossel lines, yielding equivalent information as an analogous XSW experiment would. Technical aspects of this novel method are discussed and first experimental results involving Ge and Er:LiNbO3 single crystal samples are presented, indicating that the equivalence between Kossel diffraction and XSW is indeed realized.
© EDP Sciences 1994