Effect of phonon damping on the resonance reflection of a transverse soundwave from a planar defect in a crystal

Resonance scattering of a transverse sound wave by a planar defect in an el astic isotropic medium is studied in a wide range of values of the ratio of the damping length and the size of the region of localization of longitudi nal oscillations. The transition between two limiting cases is described. T he character of the transition is demonstrated by typical plots of the depe ndence of the reflection and transmission coefficients on the parameter rel ating the wavelength of the incident wave and the strength of the defect. I t is shown that renormalization of total reflection into conventional dissi pative passage occurs for values of this parameter below a certain critical value. (C) 2000 MAIK "Nauka / Interperiodica".