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Sensitivity X-rays

XANES spectroscopy is also the basis of chemically sensitive X-ray imaging, as well as qualitative and quantitative microspectroscopy [306], ptXANES is attractive for chemical analysis, with its spatial resolution down to 10 ptm. Variations on the theme are surface EXAFS (SEXAFS), grazing incidence XAS and in situ time-resolved XAS investigations. Grazing angle XAFS can be used for the study of ultrathin multilayer systems. [Pg.643]

Figure 6.19 Catalytic in situ reactor made of a quartz capillary, suitable for use at synchrotrons for the collection of EXAFS an XRD data. The scheme of the synchrotron beamline shows the positions of the mono-chromator, the ion chambers which measure the intensity of the X-rays before and after the sample, and the position-sensitive X-ray detector which records the XRD diffractogram (adapted from Clausen [44]). Figure 6.19 Catalytic in situ reactor made of a quartz capillary, suitable for use at synchrotrons for the collection of EXAFS an XRD data. The scheme of the synchrotron beamline shows the positions of the mono-chromator, the ion chambers which measure the intensity of the X-rays before and after the sample, and the position-sensitive X-ray detector which records the XRD diffractogram (adapted from Clausen [44]).
Electron beam techniques have aided electrical measurements greatly, but these methods often lack sensitivity (X-ray and Auger spectroscopy and ESCA [electron spectroscopy for chemical analysis]) and accuracy (SIMS [secondary-ion mass spectrometry], etc.), two attributes that are of prime importance in IC process technology. Fortunately, materials can be analyzed with both accuracy and sensitivity by wet chemical analysis. [Pg.514]

Fitzgerald, R. 2000. Phase-sensitive X-ray imaging. Phys. Today 53(7), 23-26. [Pg.258]

Johann-type crystal spectrometers record an energy interval according to the size of the source simultaneously, if a position-sensitive X-ray detector of corresponding extension is available. The use of spherically-bent crystals allows partial vertical focusing, which increases the count rate by a factor of almost two for Bragg angles around 55°. [Pg.502]

Fig. 1. Principle of the set-up for the pion mass experiment consisting of the cyclotron trap with a gas cell and a curved-crystal spectrometer equipped with a two-dimensional position-sensitive X-ray detector. The focusing condition for a wave length A reflected under the Bragg angle Ob is R-sin B, where R is the (horizontal) radius of curvature. Typical values for R and the diameter of the spherically bent crystals are 3 m and 100 mm... Fig. 1. Principle of the set-up for the pion mass experiment consisting of the cyclotron trap with a gas cell and a curved-crystal spectrometer equipped with a two-dimensional position-sensitive X-ray detector. The focusing condition for a wave length A reflected under the Bragg angle Ob is R-sin B, where R is the (horizontal) radius of curvature. Typical values for R and the diameter of the spherically bent crystals are 3 m and 100 mm...
Position Sensitive X-ray Detectors For a coaxial cylinder, the capacitance is given by 2nzo... [Pg.63]

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See also in sourсe #XX -- [ Pg.155 , Pg.157 ]



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