Neutron diffraction on subcritical and supercritical krypton

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Abstract
Accurate neutron-diffraction data are presented for krypton at three densities along a supercritical (T=220 K) isotherm and at three densities in the liquid state along a subcritical (T=200 K) isotherm. The density dependence of the Fourier transform of the total correlation function, H(κ), differs significantly from the one for dense liquid rare gases determined from recent neutron scattering data. Comparisons with modified-hypernetted-chain and molecular-dynamics calculations suggest that the present data cannot be described adequately with a reliable pair potential and an (effective) Axilrod-Teller three-body potential.