ELECTRON SCATTERING BY NOBLE GASES (Ar, Kr and Xe) AT INTERMEDIATE AND HIGH ENERGIES, 30-10000 eV G. Garcia#, A. Williart$ and F. Blanco* #CIEMAT, Avenida Complutense 22, 28040 Madrid, Spain $UNED, Senda del Rey s.n., 28040 Madrid, Spain *Universidad complutense, Avenida Complutense s.n., 28040 Madrid, Spain In this paper we present semiempirical cross section data for electron scattering from Ar, Kr and Xe in a wide energy range (30-10000 eV). Simple analytical expressions have been obtained by combining accurate total cross section measurements and optical potential calculations with an asymptotic behaviour in concordance with the Born-Bethe theory.