MANIFESTATION OF QUANTUM CHAOS IN SCATTERING TECHNIQUES - APPLICATIONTO LOW-ENERGY AND PHOTOELECTRON DIFFRACTION INTENSITIES

Intensities of low-energy electron diffraction and photoelectron diffr action are analyzed from a statistical point of view. The probability distribution is compared with a Porter-Thomas law, characteristic of a chaotic quantum system, The agreement obtained is understood in terms of analogies between simple models and Berry's conjecture for a typic al wave function of a chaotic system. The consequences of this behavio r on surface structural analysis are qualitatively discussed by lookin g at the behavior of standard correlation factors. [S0031-9007(97)0522 1-6].