resonant scattering

resonant scattering

[′res·ən·ənt ′skad·ə·riŋ]
(quantum mechanics)
Scattering of a photon by a quantum-mechanical system (usually an atom or nucleus) in which the system first absorbs the photon by undergoing a transition from one of its energy states to one of higher energy, and subsequently reemits the photon by the exact inverse transition.
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References in periodicals archive ?
However, as we show below, the Coulomb interaction between delocalized WL and trapped carriers can provide an efficient relaxation mechanism yielding a high relaxation rate even for as low as n = [10.sup.9] [cm.sup.-2] density when the resonant scattering of the WL carriers is considered.
A schematic illustration of the resonant scattering as opposed to the direct scattering described by the Fermi rule is illustrated in Figure 1.
Popov, "T matrix of the homogeneous anisotropic sphere: applications to orientation-averaged resonant scattering," J.
The techniques include high resolution X-ray phase contrast and X-ray dark-field tomography, in situ small and wide angle X-ray scattering, resonant scattering and imaging and time resolved studies of charge transport and transfer.
As it turned out, high refractive index is associated with two scattering mechanisms: resonant scattering, which is related to the localization of light inside the cylinder, and non-resonant, which is characterized by smooth dependence on the wave frequency.
Kipple, "Reciprocity between the effects of resonant scattering and enhanced radiated power by electrically small antennas in the presence of nested metamaterial shells," Phys.
It has been reported that dramatically reduced [[kappa].sub.latt] in TE materials is due to one of the following mechanisms: alloy scattering [3-6], resonant scattering [9-13], anharmonic scattering [14], and interface scattering of phonons [15-17] or their combination.
However, this is very rarely used, as the wavelength variation is more gradual than for x-ray resonant scattering, and the absorption is more severe.
The bright crescent in each image is part of the sunlit hemisphere, where the 1,304-angstrom brightness is produced by "resonant scattering" -- the absorption and re-emission of sunlight by atomic oxygen.
It is observed that even though the electrical size of the turbine is on the order of the wavelength, range ringing due to resonant scattering is not very prominent.
The categories are not mutually exclusive, e.g., resonant scattering is usually part of a more general investigation of the crystallographic structure of a material, and reflectivity can be carried out at the absorption edges of the components of multilayers, or the kinetics of the evolution of microstructure can be investigated, etc.
Resonant scattering experiments have been performed at edges spanning the energy range available on BM16.

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