Antiproton-impact ionization of H$_{2}$

Antiproton-impact ionization cross sections are calculated for H$_{2}$. Both one active and two active electron time-dependent close-coupling methods are used to calculate cross sections for H$_{2}$ at various molecular orientations for incident energies ranging from 1 to 100 keV. Differences between the calculations for the single ionization of H$_{2}$ are attributed to strong electron correlation effects in the few-body system. The results are compared with experiments [1,2]. \\[4pt] [1] P Hvelplund et al. J. Phys. B 27, 925 (1994)\\[0pt] [2] H Knudsen et al. Phys. Rev. Lett. 105, 213201 (2010)