Resonant X-Ray Scattering

Fig. 3. Schematic representation of nuclear resonance scattering and X-ray resonance scattering at an K and an absorption edge. The phase digrams show the particular differences and similarities...

Fig. 20. The domains in which X-ray resonance scattering and EXAFS provide structural information. Structural resolution from diffraction is assumed to be limited by the maximum scattering angle of 60° and the wavelength range from 0.8 to 7.4 A. This compares to the specifications of the instrument given in Fig. 8...

A further increase in speed of data taking is expected by segmentation of detectors, i.e. each detector segment has its own read-out system. A linear position-sensitive detector develop recently at EMBL consists of 128 anode wires, with each of them acting as an individual counter. The integral count rate is 10 MHz of statistical events. A similar development has been started for area counters. The new diffractometer for X-ray resonance scattering in HASYLAB is equipped with three area counters (Fig. 5). This system can handle nearly a million statical events per second... 

Structural origin of dipole X-ray resonant scattering in the low-temperature phase of Ndo aSro sMnOa. Phys. Rev. B, 70,... 

Fig. 48. (a) Measured absorption coefficient, (b) X-ray resonant scattering and (c) charge scattering of TmSe as a function of energy through the L, absorption edge of Tm. The solid curves in (b) and (c) are calculated as described in the text. (From McWhan et al. 1993.)... 

Fig. 32. The integrated intensity of magnetic reflections of x-ray resonant exchange scattering measured for NdNi2BjC and SmNi2B2C. Dashed line and full line model calculations for a magnetic moment parallel to the tetragonal a-axis and c-axis, respectively (after Detlefs et al. 1997b).

X-ray resonant magnetic scattering measurements of the Ni and F signals have verified that the coupled CuNi and Py layers switch in tandem and that the switching of the pinned and free CuNi/Py layers are well separated J. W. Freeland (unpublished). 

Resonant x-ray spectra and dangling bond density Hexagonal boron nitride Resonant x-ray emission or resonance x-ray Raman scattering has recently been often studied using synchrotron radiation facilities. A successful example of the application of the DV-ATa method to the x-ray spectra is this resonance x-ray emission spectra of hexagonal boron nitride (A-BN). 

In the X-ray anomalous scattering method we make use of the fact that the scattering length of an element changes appreciably near an absorption resonance and is given by ... 

In Fe CEMS it is the 7.3 keV internally converted electrons which are normally detected but the 6.3 keV x-rays can also be used. The advantage of CEMS over normal Mossbauer studies is the nine-fold increse in the 7.3 keV electrons over the 14.4 keV y-rays. Secondly, these electrons are rapidly attenuated within the soUd which limits the probing depth of CEMS to 300 nm from the surface. For surface studies the back-scatter method is employed and one detects the conversion electrons back-scattered from the surface of the sample under study. However, it is possible by this technique to measure the y- and X-rays back-scattered following resonant absorption to increase probing depths to several microns. 

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