Full two-electron calculations of antiproton collisions with molecular hydrogen

Abstract

Total cross sections for single ionization and excitation of molecular hydrogen by antiproton impact are presented over a wide range of impact energy from 1 keV to 6.5 MeV. A nonpertubative time-dependent close-coupling method is applied to fully treat the correlated dynamics of the electrons. Good agreement is obtained between the present calculations and experimental measurements of single-ionization cross sections at high energies, whereas some discrepancies with the experiment are found around the maximum. The importance of the molecular geometry and a full two-electron description is demonstrated. The present findings provide benchmark results which might be useful for the development of molecular models.

4 pages, 3 figures

References in corpus (7)

• Fully Correlated Electronic Dynamics for Antiproton Impact Ionization of Helium
• A simple parameter-free one-center model potential for an effective one-electron description of molecular hydrogen
• Antiproton and proton collisions with the alkali metal atoms Li, Na, and K
• 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

Cited by in corpus (4)

• Physics at CERN's Antiproton Decelerator
• Calculation of Energy Loss in Antiproton Collisions with Many-Electron Systems using Ehrenfest's Theorem
• Indication of strong interatomic Coulombic decay in slow He${}^{2+}$-Ne${}_2$ collisions
• Independent-atom-model coupled-channel calculations strengthen the case for interatomic Coulomb decay as a subdominant reaction channel in slow O${}^{3+}$-Ne${}_2$ collisions