Alignment effects in charge transfer and excitation for H{sup +} and He{sup 2+} collisions with H{sub 2}{sup +}

Journal Article · Mon Aug 15 04:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.72.022720· OSTI ID:20718140

Phalen, D J; Pindzola, M S; Robicheaux, F ^[1]

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1. Department of Physics, Auburn University, Auburn, Alabama 36849-5311 (United States)

The excitation and charge transfer cross sections are calculated for the collision of H{sup +} and He{sup 2+} with H{sub 2}{sup +} molecular ions. This is the simplest example of collisions between ions and molecules or molecular ions since it involves only one electron. The results in this paper emphasize effects due to the alignment of the axis of the H{sub 2}{sup +} molecular ion relative to the atomic ion velocity vector and due to the internuclear separation. The calculations show that the cross section versus the angle between the molecular ion axis and the ion velocity vector strongly depends on the ion velocity. Our results for He{sup 2+} collisions do not agree with the experiments and calculations of Reiser, Cocke, and Braeuning [Phys. Rev. A 67, 062718 (2003)] but are in qualitative agreement with the calculations of Cheng and Esry.

• OSTI ID: 20718140
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 72; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALIGNMENT
ATOMIC IONS
ELECTRONS
EXCITATION
EXCITED STATES
HELIUM IONS
HYDROGEN IONS 1 PLUS
HYDROGEN IONS 2 PLUS
ION-MOLECULE COLLISIONS
MOLECULES
VECTORS
VELOCITY