摘要 :
Recently, we have shown that YbInCu4 and related compounds present a solid state Pomeranchuk effect. These systems have a first-order volume transition where a local moment phase coexists with a renormalized Fermi liquid in analog...
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Recently, we have shown that YbInCu4 and related compounds present a solid state Pomeranchuk effect. These systems have a first-order volume transition where a local moment phase coexists with a renormalized Fermi liquid in analogy with 3 He at its melting curve. We demonstrate here experimentally that the solid state Pomeranchuk effect, controlled by a magnetic field, can be used to produce cooling. (c) 2005 Elsevier B.V. All rights reserved.
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摘要 :
The coherence length concept and path integrals are applied for the quantum electrodynamical consideration of multiple scattering effects on high-energy radiation in a medium (the Landau-Pomeranchuk-Migdal effect). The multiple sc...
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The coherence length concept and path integrals are applied for the quantum electrodynamical consideration of multiple scattering effects on high-energy radiation in a medium (the Landau-Pomeranchuk-Migdal effect). The multiple scattering of a fast charged particle in matter is treated as a Brownian motion process. A new general equation for the average probability density of polarized radiation, depending on the energy and direction of the emitted photon, is obtained. We have also performed a numerical analysis and compared angular distributions of high-energy radiation in oriented and non-oriented crystals of tungsten as an example.
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