Single- and double-ionization cross sections for angular scattering of fast protons by helium

Journal Article · Fri Sep 01 04:00:00 EDT 1989 · Physical Review (Section) A: General Physics; (USA)

DOI:https://doi.org/10.1103/PhysRevA.40.2843· OSTI ID:5555167

Olson, R E ^[1]; Ullrich, J; Dorner, R; Schmidt-Bocking, H ^[2]

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1. Gesellschaft fur Schwerionenforschung Darmstadt m.b.H., D-6100 Darmstadt 11, Federal Republic of Germany (DE) Physics Department, University of Missouri-Rolla, Rolla, Missouri 65401
2. Institut fur Kernphysik, Universitat Frankfurt, D-6000 Frankfurt am Main, Federal Republic of Germany

The angular scattering of H{sup +} by He has been investigated for single ionization at energies of 0.5, 1.0, and 3.0 MeV; and for double ionization at 1.0 MeV. The classical-trajectory Monte Carlo method has been used within one- and two-electron models to illustrate the collision dynamics. The angular differential single-ionization cross sections are in good agreement with experiment, and display the combined effects of proton scattering from the He nucleus and its electrons. The relative fraction of double ionization, as a function of scattering angle, shows a maximum at {similar to}0.9 mrad that is in agreement with the experiments of Giese and Horsdal (Phys. Rev. Lett. 60, 2018 (1988)). This maximum is found to be due to two uncorrelated scattering events between the H{sup +} and the He atom's two electrons in the double-ionization reaction from impact parameters different than that for the single-ionization reaction.

• OSTI ID: 5555167
• Journal Information: Physical Review (Section) A: General Physics; (USA), Journal Name: Physical Review (Section) A: General Physics; (USA) Vol. 40:5; ISSN PLRAA; ISSN 0556-2791
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CATIONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
HELIUM
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
IMPACT PARAMETER
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
KEV RANGE
KEV RANGE 100-1000
MEV RANGE
MEV RANGE 01-10
MONTE CARLO METHOD
NONMETALS
RARE GASES