Volume 49, Number 1, January I 2000
|Page(s)||62 - 67|
|Section||Physics of gases, plasmas, and electric discharges|
|Published online||01 September 2002|
Direct determination of long-range dipolar interactions in by neutron diffraction
Istituto Nazionale per la Fisica della Materia, Unità di Genova v. Dodecaneso
33, I-16146 Genova, Italy
2 Dipartimento di Fisica, Università di Genova v. Dodecaneso 33, I-16146 Genova, Italy
3 Istituto di Elettronica Quantistica, Consiglio Nazionale delle Ricerche v. Panciatichi 56/30, I-50127 Firenze, Italy
4 Istituto Nazionale per la Fisica della Materia, Unità di Firenze L.go E. Fermi 2, I-50125 Firenze, Italy
5 Dipartimento di Energetica “S. Stecco”, Università di Firenze v. di S. Marta 3, I-50139 Firenze, Italy
6 Dipartimento di Fisica, Università di Firenze L.go E. Fermi 2, I-50125 Firenze, Italy
Corresponding author: firstname.lastname@example.org
Accepted: 1 November 1999
Neutron diffraction experiments at low momentum transfer q offer the remarkable possibility to simultaneously measure the strength of the longest-range two- and three-body interactions in classical fluids, namely the London double-dipole and the Axilrod-Teller triple-dipole potentials, without need to resort to any model for the pair interaction. The results here reported of a new neutron diffraction study on the low-q structure of both gaseous and liquid Kr show that, by investigating a wide density range, a direct, i.e. model-independent, experimental determination of long-range forces can be performed.
PACS: 51.90.+r – Other topics in the physics of gases / 34.20.Cf – Interatomic potentials and forces / 61.12.Ex – Neutron scattering techniques (including small-angle scattering)
© EDP Sciences, 2000
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