A Quasi-Classical Model of the Diffusion of Hypersonic Waves by a Localised Defect
The affinities between the phonon model and Debye's classical model are shown by a very elementary argument. Then a scattering problem is stated for a hypersonic wave incident on a single Schottky vacancy. As results were available concerning the classical model, an attempt was made to express them in terms of the quantical one. So a translation formula was established between both kind of models. Scattering cross-section and dispersion formulae become specially easy to apply when the wavelength is much greater than the vacancy diameter and when the vacancy density is small enough and (or) multiple scattering may be neglected.
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Document Type: Research Article
Publication date: September 1, 1975
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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