Abstract

Doubly differential cross sections (DDCSs) for single ionization of molecular hydrogen by 75-keV proton impact have been measured and calculated as a function of the projectile scattering angle and energy loss. Interference structures are observed in the scattering angular dependence of the DDCSs, which disappear, however, at electron speeds near the projectile speed. The comparison to our calculations shows that the projectile-target nucleus interaction plays a central role. Furthermore, our data suggest that for a given scattering angle, ionization favors well-defined molecular orientations.

Department(s)

Physics

Sponsor(s)

Max-Planck-Institut für Physik Komplexer Systeme
National Science Foundation (U.S.)

Keywords and Phrases

Energy Loss of Particles; Hydrogen Ions; Hydrogen Neutral Molecules; Ion-Molecule Collisions; Ionisation; Molecular Orientation; Positive Ions

International Standard Serial Number (ISSN)

1050-2947; 2469-9926

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2008 American Physical Society (APS), All rights reserved.

Included in

Physics Commons

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