Modal and Surface Wave Resonances in Acoustic-Wave Scattering from Elastic Objects and in Elastic-Wave Scattering from Cavities
Technical rept. 1 Nov 1976-31 Oct 1977
CATHOLIC UNIV OF AMERICA WASHINGTON DC DEPT OF PHYSICS
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The problems of the scattering of waves from an obstacle, no matter in which field of physics they are being considered, exhibit an essential similarity. This similarity extends from the scattering of sound waves by an elastic object acoustics over elastic wave scattering from a cavity geophysics and materials testing to the problems of particle scattering from particles and nuclei high energy and nuclear physics. While historically, progress has been made along different lines in the various fields, it has become clear that more may be learned by applying the methods of one field of physics in another one, and vice versa, so that the basic similarities of the scattering problem may be exhibited and exploited. The Breit-Wigner resonance scattering formalism of nuclear physics is applied to both acoustic and elastic wave scattering essentially another way of exhibiting the Regge poles, and relate the resonances to the eigenvibrations of the scattering object.