Answers are grounded in this paper and cite their sources.
The ionization of helium atoms by antiprotons is considered in an independent-particle model (IPM) with a model potential that accounts for polarization and binding effects of the electrons in the two-centre Coulomb potential. The model is designed to reproduce the exact ionization potential of the quasimolecular system and to allow for the existence of one bound state in the united-atom limit. We find a single-ionization cross section that is in good agreement with the results of various correlated two-electron calculations, and a double-ionization cross section that is considerably improved compared to a standard IPM calculation with a fixed atomic target potential.
No takes yet. Share an insight, caveat, or question.
Kirchner et al. (2002) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: