The Three-Body and Four-Body Interactions between Hydrogen Molecules at High Temperatures and Densities

To describe the complicate three-body and four-body interactions between hydrogen molecules at high temperatures and densities, an effective helium-atom model is presented to approximate electron cloud distribution of rotating hydrogen molecule at the outer space, on the basis of the average pair potential of Ree and Bender. The calculation results for three-body potentials are in good agreement with the CI calculations of Ree and Bender. The four-body ones are also given in this article.