Dynamic structure of dense krypton gas

We have made molecular-dynamics computer simulations of dense krypton gas (10.6×10²⁷ atoms/m³ and 296 K) using reasonably realistic pair potentials. Comparisons are made with the recent experimental data[P. A. Egelstaff et al., Phys. Rev. A 27, 1106 (1983)] for the dynamic structure factor S(q,ω) over the range $0.4<q<3.0$ ^-1. For $q<1.6$ ^-1 the influence of the attractive part of the potential is important and shorter-ranged many-body forces are found to play a role. Additional (less significant on a relative scale) effects are found in the region $q~2.7$ ^-1. Some suggestions for future work are made.