title: Many-body interaction effects on the low-k structure of liquid Kr.
abstract: Neutron diffraction measurements and theoretical calculations of the structure factor S(k) of liquid Kr are extended to small k values (k<4 nm(-1)). The results show that many-body interaction contributions have an increasing effect on S(k) as k-->0, reaching at least 40% of the measured intensity. Both the phase diagram and the low-k structural data of dense Kr turn out to be closely reproduced by the hierarchical reference theory if additional many-body forces are taken into account by an augmented strength of the Axilrod-Teller triple-dipole potential. The experimental density derivative of S(k) is also used for a very sensitive test of the theories and interaction models considered here.
authors: Istituto Nazionale per la Fisica della Materia, Unità di Ricerca di Genova, via Dodecaneso 33, I-16146 Genova, Italy.
authors: E
authors: E
authors: Guarini
authors: R
authors: R
authors: Magli
authors: M
authors: M
authors: Tau
authors: F
authors: F
authors: Barocchi
authors: G
authors: G
authors: Casanova
authors: L
authors: L
authors: Reatto
mesh_terms: D007726:Krypton / Q000737:chemistry*; D008962:Models, Theoretical; D033363:Neutron Diffraction; D055585:Physical Phenomena; D010825:Physics; D013816:Thermodynamics
chemical_list: D007726:Krypton