Structure of gaseous Kr in the low-q region by neutron scattering and interaction potentials.
Accurate experimental information on the long-range triplet interactions in noble fluids, as well as on the two-body potential, can be obtained from the low-density behavior of the static structure factor S(q) in the small-q region. The results here reported of a recent low-q neutron diffraction investigation in Kr, devoted to undercritical densities in the range 2.4<n/nm(-3)<4.3, provide important indications on the pair interactions and allow also a reliable analysis of irreducible three-body potential effects on the measured structure, from which the triple-dipole Axilrod-Teller strength is extracted with unprecedented accuracy.
Guarini
E
E
Istituto Nazionale per la Fisica della Materia, Unità di Ricerca di Genova, via Dodecaneso 33, I-16146 Genova, Italy.
Casanova
G
G
Bafile
U
U
Barocchi
F
F