NEUTRON-DIFFRACTION STUDY OF LIQUID KRYPTON AND THE INTERATOMIC INTERACTION

We show that diffraction measurements can reach the precision needed to test different models of interatomic interaction also in a dense fluid. Our measurements have been performed in krypton at several temperatures and densities in the liquid phase. Our theoretical calculations show that the density derivative of the static structure, contrary to the function itself, is sensitive to the shape of the interaction and the comparison with the experimental data gives another test of the interaction models.