Theoretical description of the ejected-electron spectrum in collisions of 1. 5-MeV/u F[sup 9+] with helium

Journal Article · Thu Sep 01 00:00:00 EDT 1994 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.50.2390· OSTI ID:7197202

Schultz, D R ^[1]; Reinhold, C O ^[2]

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1. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6373 (United States)
2. University of Tennessee, Knoxville, Tennessee 37996-1200 (United States) Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6377 (United States)

We present the results of an extensive classical trajectory Monte Carlo (CTMC) simulation of the ejected electron spectrum in collisions of 1.5-MeV/u F[sup 9+] with helium. Excellent agreement is found with the measurements of Lee [ital et] [ital al]. [Phys. Rev. A 41, 4816 (1990)] for ejection to 0[degree]. In particular, the simulation reproduces extremely well the shape and magnitude of the electron-capture-to-the-continuum and binary peaks. We contrast this agreement with calculations utilizing various quantum-mechanical perturbation theories. Also, a continuum-distorted-wave--eikonal-initial-state approach, which describes the interaction between the outgoing electron and the residual target ion through a model potential, has been utilized. This approach is shown to be an improvement over conventional calculations based on the use of effective charges. We draw conclusions regarding the proper representation of the collision dynamics leading to electron ejection in the low-energy, electron-capture-to-the-continuum, and binary peak regimes. Calculations of the doubly differential ionization cross section for non-0[degree] ejection are displayed as well.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7197202
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 50:3; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CALCULATION METHODS
CHARGED PARTICLES
CLASSICAL MECHANICS
COLLISIONS
ELECTRON EMISSION
ELEMENTS
EMISSION
ENERGY RANGE
ENERGY SPECTRA
FLUIDS
FLUORINE IONS
GASES
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MECHANICS
MEV RANGE
MEV RANGE 01-10
MONTE CARLO METHOD
MULTICHARGED IONS
NONMETALS
RARE GASES
SPECTRA
TRAJECTORIES