Long Range Potential Effects in Low Density Krypton Gas
Journal Article
·
· Physical Review Letters
- Dipartimento di Fisica, Universita degli Studi di Firenze, Largo E. Fermi 2, I-50125 Firenze (Italy)
- Istituto Nazionale di Fisica della Materia, Sezione di Firenze, Largo E. Fermi 2, I-50125 Firenze (Italy)
- Physics Department, University of Guelph, Ontario, N1G 2W1 (CANADA)
- Istituto di Elettronica Quantistica, Consiglio Nazionale delle Ricerche, Via Panciatichi 56/30, I-50127 Firenze (Italy)
- Dipartimento di Energetica S. Stecco, Universita degli Studi di Firenze, Via di S. Marta 3, I-50139 Firenze (Italy)
- Interfacultair Reactor Instituut, Technische Universiteit Delft, 2629 JB Delft (The Netherlands)
Small angle neutron scattering (SANS) in low density {sup 86}Kr gas has been performed in order to measure the small-k behavior of the static structure factor S(k) . Three number densities between 1.52 and 2.42 nm{sup {minus}3} along the T=297 K isotherm have been studied. The small-k dependence of the Fourier transform c(k) of the direct correlation function c(r) has been derived. The experimental determination of the k{sup 3} term in the behavior of c(k) has led to a direct measurement of the London dispersion interaction in the pair potential of krypton. Also the contribution of the three-body potential in the asymptotic behavior of c(r) has been observed and related to the magnitude of the three-body interaction potential. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 531899
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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