Many-body interaction effects on the low-k structure of liquid Kr

E. Guarini, R. Magli, M. Tau, F. Barocchi, G. Casanova, and L. Reatto
Phys. Rev. E 63, 052201 – Published 11 April 2001
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Abstract

Neutron diffraction measurements and theoretical calculations of the structure factor S(k) of liquid Kr are extended to small k values (k<4nm1). The results show that many-body interaction contributions have an increasing effect on S(k) as k0, 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.

  • Received 8 June 2000

DOI:https://doi.org/10.1103/PhysRevE.63.052201

©2001 American Physical Society

Authors & Affiliations

E. Guarini1, R. Magli2,*, M. Tau3, F. Barocchi4, G. Casanova5, and L. Reatto6

  • 1Istituto Nazionale per la Fisica della Materia, Unità di Ricerca di Genova, via Dodecaneso 33, I-16146 Genova, Italy
  • 2Dipartimento di Energetica “S. Stecco,” Università di Firenze, via di S. Marta 3, I-50139 Firenze, ItalyINFM Unità di Ricerca di Firenze, Italy
  • 3Dipartimento di Fisica, Università di Parma and INFM, viale delle Scienze, I-43100 Parma, Italy
  • 4Dipartimento di Fisica, Università di Firenze and INFM, largo E. Fermi 2, I-50125 Firenze, Italy
  • 5Dipartimento di Fisica, Università di Genova and INFM, via Dodecaneso 33, I-16146 Genova, Italy
  • 6Dipartimento di Fisica, Università di Milano and INFM, via Celoria 16, I-20133 Milano, Italy

  • *Present address: Dipartimento di Chimica e Biochimica Medica, Università di Milano, LITA via F.lli Cervi 93, I-20090 Segrate Milano, Italy.

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Vol. 63, Iss. 5 — May 2001

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