title: Hard-sphere-like dynamics in a non-hard-sphere liquid.
abstract: The collective dynamics of liquid gallium close to the melting point has been studied using inelastic x-ray scattering to probe length scales smaller than the size of the first coordination shell. Although the structural properties of this partially covalent liquid strongly deviate from a simple hard-sphere model, the dynamics, as reflected in the quasielastic scattering, are beautifully described within the framework of the extended heat mode approximation of Enskog's kinetic theory, analytically derived for a hard-sphere system. The present work demonstrates, therefore, the applicability of Enskog's theory beyond simple liquids.
authors.affiliation: INFM CRS-SOFT, c/o Universitá di Roma LaSapienza, I-00185, Roma, Italy.
authors.forename: T
authors.initials: T
authors.lastname: Scopigno
authors.forename: R
authors.initials: R
authors.lastname: Di Leonardo
authors.forename: L
authors.initials: L
authors.lastname: Comez
authors.forename: A Q R
authors.initials: AQ
authors.lastname: Baron
authors.forename: D
authors.initials: D
authors.lastname: Fioretto
authors.forename: G
authors.initials: G
authors.lastname: Ruocco