Diffracted beam monochromator

Figure 12 Three different monochromator/sample geometries used in powder diffraction (a) flat diffracted beam monochromator, parallel arrangement, (b) curved diffracted beam monochromator, angular arrangement, and (c) flat primary beam monochromator, parallel arrangement...

The three most common geometries of a crystal monochromator and a sample, used in powder diffraction, are illustrated in Figure 2.15 and their characteristics are compared in Table 2.4. Diffracted beam monochromators Figure 2.15a, b) have a relatively high intensity output (or in other words have low intensity losses) but do not separate the Kaj and Ka2 doublet. The removal of both the KP component and white radiation is excellent. The... 

The diffractometer in Fig. 15-10(a) is equipped with a diffracted-beam monochromator. 

Figure 2.10 Bragg Brentano geometry with a diffracted beam monochromator. The crystal is usually graphite, which has a low degree of crystalline perfection, and hence a large acceptance angle (tenths of a degree). Thus a flat crystal is adequate.

XRD. XRD (X-ray diffraction) analysis was performed on a Philips APD 3720 diffraction system with Cu K-alpha 1,2 radiation and a diffraction beam monochromator. The washcoat was scraped from the honeycomb, ground and mounted on a glass slide for analysis between 3.0 and 80.0°... 

Align the incident beam monochromator to deliver a beam passing accurately over the second (specimen) axis. This procedure is exactly as for high resolution double-axis diffraction. 

The diffraction grating monochromator is a specific example of mnltiple beam interference effects. Interference between multiple beams can be generated by both division of amplitude (as in the Fabry-Perot interferometer) or by division of wave front (as in the diffraction grating). (Figures 5.9 and 5.10)... 

Fig. 3. X-ray diffractogram of Class-F bituminous coal fly ash. Analytical conditions diffraction data were collected using a Philips X-ray powder diffractometer (45 kV/30-40 mA CuKa theta-compensating variable divergence slit diffracted-beam graphite monochromator scintillation detector) automated with an MDI/Radix Databox. The scan parameters were typically 0.02° step size for 1 s count times over a range of 5-60° 2-theta. All data were analysed and displayed using a data reduction and display code (JADE) from Materials Data Inc., livermore, CA.

The diffraction grating monochromator is a specific example of multiple-beam interference effects. Interference between multiple beams can be generated by both division of... 

X-ray diffraction. XRD patterns were acquired on a Philips PW1710 vertical goniometer using CuKa radiation selected by a graphite monochromator in the diffracted beam. All the samples were fully hydrated before XRD diffractograms were measured. Silicon powder was used as an internal standard. 

Powder diffraction spectra were collected at the State University of New York X3A beamline at the National Synchrotron Light Source. X-rays of wavelength A = 0.800 A were produced by a double Si(lll) monochromator, and the diffracted beam was analysed with a Ge(lll) crystal. The resulting resolution was 0.05° full width at half maximum. The room-temperature diffraction pattern is shown in Fig. 2. For comparison, we also show the powder diffraction pattern of pure C o taken at A = 1.500 A. The Cfto spectrum matches previous results. ... 

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