3D quantum scattering calculations of the reaction He + H,+ +HeH+ + H for total angular momentum J = 0

An improved version of the S-matrix Kohn variational method has been applied to calculating 3D quantum reaction probabil-ities of the ion-molecular reaction He+ HT (u) AHeH+ + H. The calculation is carried out for total angular momentum J = 0 and employs the DIM potential surface of Kuntz. Our results show that vibrational excitation of H: enhances the reaction probabili-ties and are in qualitative agreement with early experimental results. The calculated reaction probabilities are found to be highly oscillatory as a function of scattering energy and are associated with resonances of the system. 1