Collisions of antiprotons with hydrogen molecular ions

Abstract

Time-dependent close-coupling calculations of the ionization and excitation cross section for antiproton collisions with molecular hydrogen ions are performed in an impact-energy range from 0.5 keV to 10 MeV. The Born-Oppenheimer and Franck-Condon approximations as well as the impact parameter method are applied in order to describe the target molecule and the collision process. It is shown that three perpendicular orientations of the molecular axis with respect to the trajectory are sufficient to accurately reproduce the ionization cross section calculated by [Sakimoto, Phys. Rev. A 71, 062704 (2005)] reducing the numerical effort drastically. The independent-event model is employed to approximate the cross section for double ionization and H+ production in antiproton collisions with H2.

12 pages, 5 figures, 4 tables

References in corpus (5)

• 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

Cited by in corpus (3)

• Full two-electron calculations of antiproton collisions with molecular hydrogen
• Collisions involving antiprotons and antihydrogen: an overview
• 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