Abstract
The shape of the bistatic cross section at the resonances of an elastic scattering object has been used experimentally [G. Maze and J. Ripoche, J. Acoust. Soc. Am. 73, 41–43 (1983)] to determine the order of the resonance. The basic principle of this approach is demonstrated here theoretically; for the case of an elastic sphere, it is used to identify the dipole resonance of the Rayleigh surface wave, which previously could not be determined with certainty from backscattering measurements alone.
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