Results 251 to 260 of about 246,721 (295)
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Physical Review Letters, 2000
The spectrum of coherent scattering induced by electrostriction in gases has been analyzed in the previously unexplored, free-molecule limit by solving Boltzmann's equation with a periodic force due to the optical fields. Calculated and measured spectra of several gases at rarefied conditions are nearly Gaussian with widths approximately 10% wider than
, Grinstead, , Barker
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The spectrum of coherent scattering induced by electrostriction in gases has been analyzed in the previously unexplored, free-molecule limit by solving Boltzmann's equation with a periodic force due to the optical fields. Calculated and measured spectra of several gases at rarefied conditions are nearly Gaussian with widths approximately 10% wider than
, Grinstead, , Barker
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Variable Coherence Scattering Microscopy
Physical Review Letters, 2005We propose and demonstrate the feasibility of a new microscopic technique, which is based on variable coherence illumination. By manipulating the spatial coherence properties of an incident evanescent field, subwavelength resolution is achieved over a large field of view from far-field intensity measurements.
Baleine, Erwan, Dogariu, Aristide
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Coherent Rayleigh-Brillouin Scattering
Physical Review Letters, 2002Coherent Rayleigh-Brillouin scattering in gases has been studied experimentally for the first time in the kinetic regime and shown to give line shapes that differ significantly from the spontaneous Rayleigh-Brillouin scattering. A kinetic model was developed to obtain an analytic solution of the line shape for monatomic gases, and good agreement with ...
Xingguo, Pan +2 more
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Journal of Quantitative Spectroscopy and Radiative Transfer, 1973
Abstract The paper is devoted to the consideration of the problems of non-coherent scattering in a spectral line for an arbitrary redistribution law. The representation of the redistribution function r(x′,x) in the form r(χ′,χ) = ∑ k = 1 ∞ A k α k (χ′)α k (χ) is used to study the various mechanisms of line broadening.
N.B. Yengibarian, A.G. Nicoghossian
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Abstract The paper is devoted to the consideration of the problems of non-coherent scattering in a spectral line for an arbitrary redistribution law. The representation of the redistribution function r(x′,x) in the form r(χ′,χ) = ∑ k = 1 ∞ A k α k (χ′)α k (χ) is used to study the various mechanisms of line broadening.
N.B. Yengibarian, A.G. Nicoghossian
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Coherent scatter in diagnostic radiology
Medical Physics, 1983Coherent scatter is often ignored in diagnostic radiology because its cross section is relatively small, and because it is assumed to be indistinguishable from primary radiation. Single‐scatter calculations, however, show that coherently scattered photons diverge sufficiently from the primary ray to degrade image contrast, and that they account for a ...
P C, Johns, M J, Yaffe
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Relativistic scattering coherence
Physical Review D, 1986Wave propagation through inhomogeneous, turbulent media is investigated for the case where the signal and inhomogeneities move relativistically. Although in classical treatments the mean-square angular deviations grow as the path length, this is found not to be true relativistically.
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Spatial coherence discrimination in scattering
Optics Letters, 1988Expressions are derived, valid within the accuracy of the first Born approximation, for the cross-spectral density and for the spectral intensity of the field that is produced by scattering of radiation of any state of spatial coherence. The results are illustrated by examples that show quantitatively the difference between scattering of laser light ...
J, Jannson, T, Jannson, E, Wolf
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Nuclear and Particle Physics Proceedings, 2015
Abstract The experimental program to search for the coherent elastic neutrino-nucleus scattering at the Spallation Neutron Source is presented.
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Abstract The experimental program to search for the coherent elastic neutrino-nucleus scattering at the Spallation Neutron Source is presented.
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Inverse Scattering for Optical Coherence Tomography
Frontiers in Optics, 2005Inverse scattering theory for optical coherence tomography (OCT) is developed. The results are used to produce algorithms to resolve three-dimensional object structure, taking into account the finite beam width, diffraction, and defocusing effects. The resolution normally achieved only in the focal plane of the OCT system is shown to be available for ...
Tyler S, Ralston +3 more
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Journal of Physics: Condensed Matter, 2004
This is a tutorial paper on the properties of partially coherent hard x-ray beams and their use in the structural analysis of condensed matter. The role of synchrotron radiation in the generation of coherent x-ray beams is highlighted and the requirements on the source properties are discussed.
Friso van der Veen, Franz Pfeiffer
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This is a tutorial paper on the properties of partially coherent hard x-ray beams and their use in the structural analysis of condensed matter. The role of synchrotron radiation in the generation of coherent x-ray beams is highlighted and the requirements on the source properties are discussed.
Friso van der Veen, Franz Pfeiffer
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