A theoretical study of ionization processes in low-energy collisions between antiprotons and atomic hydrogen using discrete-variable-representation methods

Ionization in collisions of atomic hydrogen with antiprotons ( ) are studied in the energy region 20-5000 eV by solving directly a semiclassical time-dependent Schrödinger equation with use of a discrete-variable-representation (DVR) algorithm. In the present semiclassical method, only one degree of freedom, i.e. the radial distance between and H is treated classically and all the other degrees of freedom are treated quantum mechanically. Hence, we can consider correctly the conservation of the total angular momentum, and also naturally the bent effect of the relative trajectory of + H.