Abstract
Potential-energy curves of six , two , and one states have been determined for the +He→+ process by means of ab initio calculations with configuration interaction. The matrix elements of the operator d/dR between the four states and the two states involved in the collisional process have been calculated by the rigorous finite-difference technique. A very peaked radial coupling matrix element is observed at 8.30 a.u. corresponding to an avoided crossing between the entry channel and the state dissociating to {(3d)+}. Two other avoided crossings between states are observable at 7.50 and 6.35 a.u. Rotational and radial couplings involving states have also been determined.
- Received 2 March 1987
DOI:https://doi.org/10.1103/PhysRevA.36.1994
©1987 American Physical Society