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Mostrando ítems 31-40 de 2075
Observation of cooperative Mie scattering from an ultracold atomic cloud
(AMER PHYSICAL SOC, 2010)
Scattering of light at a distribution of scatterers is an intrinsically cooperative process, which means that the scattering rate and the angular distribution of the scattered light are essentially governed by bulk properties ...
Diffraction of swift atoms after grazing scattering from metal surfaces: N/Ag(111) system
(American Physical Society, 2010-11-11)
Diffraction patterns produced by grazing scattering of fast N atoms from a Ag(111) surface are investigated by employing the surface eikonal approximation. This method is a distorted-wave theory that takes into account the ...
Influence of the polarization in grazing scattering of fast helium atoms from LiF(001) surfaces
(American Physical Society, 2008-12)
Grazing scattering of neutral atoms from insulator surfaces is investigated in the intermediate velocity range, in which interference effects have recently been observed. To describe this process we introduce a distortedwave ...
Modification of radiation pressure due to cooperative scattering of light
(SPRINGER, 2010)
Cooperative spontaneous emission of a single photon from a cloud of N atoms modifies substantially the radiation pressure exerted by a far-detuned laser beam exciting the atoms. On one hand, the force induced by photon ...
Convergent variational calculation of positronium-hydrogen-atom scattering lengths
(Iop Publishing Ltd, 2001-03-28)
We present a convergent variational basis-set calculational scheme for elastic scattering of the positronium atom by the hydrogen atom in S wave. Highly correlated trial functions with appropriate symmetry are needed to ...
Convergent variational calculation of positronium-hydrogen-atom scattering lengths
(Iop Publishing Ltd, 2001-03-28)
We present a convergent variational basis-set calculational scheme for elastic scattering of the positronium atom by the hydrogen atom in S wave. Highly correlated trial functions with appropriate symmetry are needed to ...
Resonances in Mie scattering by an inhomogeneous atomic cloud
(EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETYMULHOUSE, 2012)
Despite the quantum nature of the process, collective scattering by dense cold samples of two-level atoms can be interpreted classically describing the sample as a macroscopic object with a complex refractive index. We ...
Atomic pair distribution function at the Brazilian Synchrotron Light Laboratory: Application to the Pb1-xLaxZr0.40Ti0.60O3 ferroelectric system
(2017-09-01)
This work reports the setting up of the X-ray diffraction and spectroscopy beamline at the Brazilian Synchrotron Light Laboratory for performing total scattering experiments to be analyzed by atomic pair distribution ...
Calculation of elastic scattering cross sections of low-energy electrons by PbH4 and SnH4
(Amer Inst PhysicsWoodbury, 1995)