Antiproton-Impact Single and Double Ionization of He and H$_2$

A time-dependent close-coupling (TDCC) method has been used to calculate total cross sections for the antiproton-impact single and double ionization of He and H$_2$ for incident energies up to 100 keV. One active electron TDCC-3D calculations for the single ionization of He and H$_2$ yield cross sections at low energies higher than CERN experiments. On the other hand, two active electron TDCC-6D calculations for the single ionization of He and H$_2$ yield cross sections at low energies in reasonable agreement with CERN experiments. The TDCC-6D calculations also yield double ionization cross sections for He and H$_2$. Work is in progress on the calculation of fully differential cross sections for antiproton-impact ionization of a variety of atoms and diatomic molecules.