Rayleigh component

This equation is, of course, simply a definition of Ro(kx). Its usefulness arises from the explicit separation of the geometrical and Rayleigh components of the reflectance. Moreover, the fraction (k — kfy/ik — k ) in (7.26) contributes significantly only when kx is close to kp. The Rayleigh wavenumber is always greater than the bulk shear wavevector ks by 5-10 per cent or so (Table 6.2), and since R(kx) = 1 for kx > ks, again cf. Fig. 6.3(b)i, the approximation may be made that... 

Figure 10 illustrates the effect in sodium, showing that the Rayleigh component was not trapped. 

To get a Raman spectrum, it is necessary to expose a specimen to a monochromatic source of exciting photons, and then measure the intensity of the scattered beam of light. The intensity of the Raman scattered constituent is, by far, inferior than the Rayleigh scattered part. Then, filters and diffraction gratings are utilized to suppress the Rayleigh component. Besides, an extremely sensitive detector is necessary to sense the almost imperceptibly scattered Raman photons [57],... 

Y. Yeh and R. N. Keeler. Experimental study of reaction kinetics by light scattering. Part 1 Polarized Rayleigh component. J. Chem. Phys., 57 112(>-1127 (1969). 

An energy-dispersive detector can be used to isolate the fluorescent radiation from the Compton and Rayleigh components. 

When a molecular gas is intensely irradiated with monochromatic light, usually from a laser, a spectrum of Raman lines is generated close to the strong elastic Rayleigh component. 

Fig. 8. Li t scattering spectra of polyethyl methacrylate in the gigacycle region recorded immediately below the glass transition (solid line) and immediately above (dashed line) (75). The Rayleigh component is reduced by a factor of 10. The unusually high ratio of the Rayleigh line to the Brillouin line and the sharp change atr, has been shown to be due to inhomogeneities present in the sample (see text)...

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