By Shih-Lin Chang
This entire textual content describes the basics of X-ray multiple-wave interplay in crystals and its purposes in condensed subject physics and crystallography. It covers present theoretical ways and alertness equipment for lots of fabrics, together with macromolecular crystals, skinny motion pictures, semiconductors, quasicrystals and nonlinear optical fabrics. X-ray optics is usually addressed. Designed basically as a reference for researchers in condensed topic, crystallography, fabrics technological know-how, and synchrotron-related subject matters, the booklet may also be necessary as a textbook for graduate and senior-year undergraduate classes on exact subject matters in X-ray diffraction.
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Extra resources for X-Ray Multiple-Wave Diffraction: Theory and Application
Similar situations occur for a multiple-wave diffraction, though the interaction among the diffracted waves of which is more complicated than that of a two-wave diffraction. The details of the kinematical and dynamical theories in multiple-wave cases will be given in Chaps. 5 and 6. 4 Factors Affecting the Diffraction Intensity 29 angle 2B, or even by making a B-2B scan. The B scan, sometimes called w scan, is performed when the detector is stationary at a given 2B. A plot of intensity versus B, the so-called rocking curve, provides the intensity distribution along the transverse direction perpendicular to the reciprocal lattice vector of the Bragg reflection investigated.
In and lp are the vector components of the secondary reciprocal lattice vector l normal and parallel to g. Suppose that initially the secondary reciprocal lattice point is not situated On the surface of the Ewald sphere. The projection of its initial position shown in Fig. 3(b) is L'. The corresponding normal component of l is l~. At this moment, a reference unit vector v'is chosen to lie in the plane of incidence of the G reflection and be perpendicular to g. To bring the secondary reciprocal lattice point from point L' to L, the crystal needs to be rotated by an angle 'l/J around g.
The Hi~f terms are due to the interaction between the spin magnetic moment of the electron and the magnetic field. 13) € is the unit-vector of polarization, and k and ware the wave-vector and angular frequency of the EM wave. c, and Va represent the speed of light in vacuum, the Planck constant h/21f, and the volume irradiated, respectively. 14) where the first term on the right is related to the absorption of a photon quantum and the second term to the emission of a photon quantum by an electron.
X-Ray Multiple-Wave Diffraction: Theory and Application by Shih-Lin Chang