Theory of collective motion of interacting gas of polyvalent Hg atoms at 3.0, 6.3 and 9.0 particles per nm3

Abstract Collective dynamics of interacting gaseous mercury at high temperatures and pressures having densities of 3.0, 2.1 and 1.0 g cm −3 , as determined very recently by the measurement of dynamical structure factor using the inelastic X-ray scattering, have been successfully explained, making use of the recently modified microscopic theory of a simple fluid. It also turns out that in determining the collective dynamics of all the three systems of the mercury vapor, the two body interactions, as prevalent in a weakly interacting system, play a dominant role.