Molecular treatment of single (dissociative and nondissociative) and double electron capture in He2 H2collisions

We present close-coupling calculations of total cross sections for single and double electron capture in He 2+ + H 2 collisions in the range 0.5– 25 keV amu −1 , and compare them with experimental data. We confirm the experimental finding that the dominant process for E ≳ 3 keV amu −1 is the nondissociative capture He 2+ + H 2 → He + (2 l ) + H 2 + (1σ g ), while at lower energies it is dissociative capture leading to He + (1s) + H + + H. Our calculations also show that He(1s2 l ) is the main output of the two electron capture process.