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.
Many-body interaction effects on the low-k structure of liquid Kr / E. Guarini, R. Magli, M. Tau, F. Barocchi, G. Casanova, L. Reatto. - In: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS. - ISSN 1539-3755. - 63:5, Part 1 (Article Num. 052201)(2001 Apr 11), pp. 522011-522014.
|Titolo:||Many-body interaction effects on the low-k structure of liquid Kr|
MAGLI, RENATO (Secondo)
|Settore Scientifico Disciplinare:||Settore FIS/01 - Fisica Sperimentale|
|Data di pubblicazione:||11-apr-2001|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1103/PhysRevE.63.052201|
|Appare nelle tipologie:||01 - Articolo su periodico|