Antiproton collisions with molecular hydrogen

Abstract

Theoretical antiproton and proton cross sections for ionization and excitation of hydrogen molecules as well as energy spectra of the ionized electrons were calculated in the impact-energy range from 8 to 4000 keV. The cross sections were computed with the close-coupling formulation of the semi-classical impact-parameter method. The target was described using a one-active electron model centered on the target and assuming a fixed internuclear distance during the collision process. The dependence of the ionization cross sections on the internuclear distance is examined. The present cross sections are compared with experimental and theoretical data from the literature. For impact energies E > 90 keV the obtained results for ionization by antiproton impact are comparable to the experimental data while they disagree for energies E < 80 keV.

11 pages, 8 figures

References in corpus (4)

• Fully Correlated Electronic Dynamics for Antiproton Impact Ionization of Helium
• Ionisation of hydrogen molecule in intense ultrashort laser pulses: parallel versus perpendicular orientation
• Antiproton and proton collisions with the alkali metal atoms Li, Na, and K
• Resonant Phenomena in Antihydrogen-Hydrogen Scattering

Cited by in corpus (8)

• A simple parameter-free one-center model potential for an effective one-electron description of molecular hydrogen
• Ionization of molecular hydrogen and deuterium by a frequency-doubled Ti:sapphire laser pulses
• Full two-electron calculations of antiproton collisions with molecular hydrogen
• Stopping power of antiprotons in H, H2, and He targets
• Collisions of antiprotons with hydrogen molecular ions
• Collisions of low-energy antiprotons with molecular hydrogen: ionization, excitation and stopping power
• Wave Packet Simulations of Antiproton Scattering on Molecular Hydrogen
• Interaction of antiprotons with Rb atoms and a comparison of antiproton stopping powers of the atoms H, Li, Na, K, and Rb