Computer simulation of FIR absorption in pure rare gases

Dipole correlation functions and the corresponding FIR spectra of pure rare gases were simulated assuming a quadrupole moment to be induced in a colliding pair of atoms and the quadrupole to induce in turn a dipole in a third atom. The simulation takes into account only ternary interactions and is thus relevant to the, relatively low-density, gas phase. However, the results obtained agree well with a previous MD simulation of dense Kr.