A study of interactions in He2+1 in terms of the electronic forces

The He+He+1 interactions have been studied, as a function of the internuclear separation R, in terms of the electronic forces acting on the nuclei and the change in the charge distribution. The analysis reveals that at large R the atomic densities are polarized inwards, causing an attractive force on each nucleus, while at small R the difference in the nature of the interactions in the 2Σsub(u) and 2Σsub(g) systems is noted. It is seen that the He+ He+1 (2Σsub(u)) interaction is less attractive than the He+1 + He+1 interaction at lower values of R. (author)