Resonance Scattering Spectroscopy by the MIIR

Abstract

The “Resonance Scattering Theory,” discovered in 1977 and 1978 by Uberall1–3 was illustrated for the first time in 1981 by the researchers of the “LEAH Ultrasons” (now called: LAUE, URA CNRS 1373), Maze et al.4–7 who obtained the first “Resonance Spectrum” of a cylindrical target immersed in water by means of the MIIR (Method of Isolation and Identification of Resonances). This “quasi-harmonic MIIR” gave rise to derived methods: the “short-pulse MIIR” (1986–1989) and, more recently, the “Im/Re MIR” (1989). These methods are applied to different studies (external or internal excitation) of infinite or finite length targets and inclusions in elastic materials.