Diffusion coefficient and interaction potential of the (H, H2) system

Abstract

Binary diffusion coefficients of atomic and molecular hydrogen are calculated from the collision integrals. The interaction potential between the atom and the molecule used in the present calculation is quite different from the Lennard‐Jones, Buckingham, and exponential potentials commonly used in the transport studies. It is generated from a H₃ potential surface in the inner region and joined to the van der Waals attraction in the outer region. The results from various potentials are compared. The present results, which are larger than those of previous calculations, seem to agree generally with the most recent measurements.