Ionization in fast-neutral-particle--atom collisions: H and He atoms impacting on He

Journal Article · Sun Mar 01 04:00:00 EST 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.2850· OSTI ID:7205837

Heil, O ^[1]; DuBois, R D ^[2]; Maier, R; Kuzel, M; Groeneveld, K ^[1]

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1. Institut fuer Kernphysik der J. W. Goethe Universitaet Frankfurt, August-Euler-Strasse 6, Frankfurt am Main (Germany)
2. Pacific Northwest Laboratory, P.O. Box 999, Richland, Washington 99352 (United States)

Experimental and theoretical data pertaining to the doubly differential electron emission occurring in collisions between structured projectiles and atoms are presented. How one or two loosely bound projectile electrons influence the ionization process was investigated for fast H- and He-atom impact on helium. Standard noncoincidence and ionized projectile--emitted-electron coincidence techniques were used to study the electron emission for 0.5- and 1-MeV/amu impact energies. The experimental data demonstrate the importance of events where both the projectile and the target are ionized in a single collision. From a comparison of theoretical calculations made using the first-order Born approximation and the experimental data, it is concluded that single ionization of the target and of the projectile are adequately described by such a model but that improved models are essential in order to account for the observed simultaneous projectile-target ionization events.

• DOE Contract Number: AC06-76RL01830
• OSTI ID: 7205837
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:5; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
ELECTRON EMISSION
ELEMENTS
EMISSION
ENERGY RANGE
FLUIDS
GASES
HELIUM
HYDROGEN
IONIZATION
KEV RANGE
KEV RANGE 100-1000
MEV RANGE
MEV RANGE 01-10
NONMETALS
RARE GASES