Differential cross sections for single ionization of H{sub 2} by 75-keV proton impact

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.032712· OSTI ID:21541290

Chowdhury, U; Schulz, M; Madison, D H ^[1]

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1. Missouri University of Science and Technology, Department of Physics and Laboratory for Atomic, Molecular, and Optical Research, Rolla, Missouri 65401 (United States)

We have calculated triply differential cross sections (TDCS) and doubly differential cross sections (DDCS) for single ionization of H{sub 2} by 75-keV proton impact using the molecular three-body distorted-wave-eikonal initial-state (M3DW-EIS) approach. Previously published measured DDCS (differential in the projectile scattering angle and integrated over the ejected electron angles) found pronounced structures at relatively large angles that were interpreted as an interference resulting from the two-centered potential of the molecule. Theory treating H{sub 2} as atomic H multiplied by a molecular interference factor only predicts the observed structure when assumptions are made about the molecular orientation. Here we apply the M3DW-EIS method, which does not rely on such an ad hoc approach, but rather treats the interference from first principles.

• OSTI ID: 21541290
• Journal Information: Physical Review. A, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevA.83.032712; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
EIKONAL APPROXIMATION
ELECTRONS
HYDROGEN
INTERFERENCE
IONIZATION
KEV RANGE
MOLECULES
ORIENTATION
POTENTIALS
PROTONS
SCATTERING
THREE-BODY PROBLEM
APPROXIMATIONS
BARYONS
CALCULATION METHODS
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
HADRONS
LEPTONS
MANY-BODY PROBLEM
NONMETALS
NUCLEONS