Modelling the polarizability of the dihydrogen–argon pair

The collision-induced (CI) pair polarizability of dihydrogen–argon ( H 2 – Ar ) pair has been studied using quantum-chemical and analytical methods. We have proposed a procedure to determine the rotationally adapted (symmetry adapted) components of the CI polarizability tensor. The corresponding irreducible spherical symmetry adapted components are computed for the H 2 – Ar pair. We have analyzed the dipole-induced dipole (DID) model pair polarizability tensor for H 2 – Ar . Good agreement between the DID allowed rotationally adapted CI H 2 – Ar polarizability components and those computed by quantum-chemical methods is found.