منابع مشابه
Accurate Cross Sections for Microanalysis
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Physically motivated expressions for the transport cross sections describing classical scattering in the Lennard-Jones potential are proposed. These expressions, which agree with the numerical results better than to within ±1%, can be easy implemented in practical situations. Some relevant examples are provided.
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For fused tapered fiber couplers with weakly fused cross sections, power coupling takes place between two touching tapered cladding cylinders embedded in the air, and the cylinders then become a strongly guiding structure. We provide accurate polarization-dependent coupling coefficients for such a structure, on the basis of a rigorous vectorial numerical calculation. Our results for the corresp...
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We present an accurate measurement and a quantitative analysis of electron-beam-induced displacements of carbon atoms in single-layer graphene. We directly measure the atomic displacement ("knock-on") cross section by counting the lost atoms as a function of the electron-beam energy and applied dose. Further, we separate knock-on damage (originating from the collision of the beam electrons with...
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Suppose that M is a smooth manifold and Tt : M → M is a flow, i.e. a one-parameter group of diffeomorphisms. One way of studying this flow is by looking at a cross-section—that is to say, a codimension 1 submanifold N ⊂ M that is transverse to the direction of the flow. The transversality condition implies that each orbit intersects N in a discrete set. In other words, for each point x of M , t...
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ژورنال
عنوان ژورنال: Journal of Research of the National Institute of Standards and Technology
سال: 2002
ISSN: 1044-677X
DOI: 10.6028/jres.107.041