Double electron capture and the angular distribution of ejected electrons in Ne[sup 8+]-He collisions

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.1298· OSTI ID:6172610

Chen, Z; Lin, C D ^[1]

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1. Department of Physics, Kansas State University, Manhattan, Kansas 66506-2601 (United States)

Double-electron-capture cross sections to individual doubly excited states and autoionizing electron spectra at fixed angles for Ne[sup 8+]-He collisions are calculated and analyzed for collision energies from 20 to 80 keV/amu. An independent-electron approximation is adopted where the amplitudes for double capture are derived from the antisymmetrized product of single-electron-capture amplitudes properly weighted with configuration-interaction coefficients. By choosing the quantization axis to be perpendicular to the collision plane, we also study the propensity rule for the [ital M] distribution of the cross section for each doubly excited state. The electron spectra at 0[degree] are compared with experiments. At 80 keV/amu collision energy, our theoretical spectrum agrees with experiment very well. At lower energies, the agreements are not as good, but the dominant features are well predicted.

• OSTI ID: 6172610
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:2; 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
ANGULAR DISTRIBUTION
ATOM COLLISIONS
AUTOIONIZATION
CAPTURE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DISTRIBUTION
ELECTRON CAPTURE
ELEMENTS
ENERGY LEVELS
ENERGY RANGE
EXCITED STATES
FLUIDS
GASES
HELIUM
ION COLLISIONS
ION-ATOM COLLISIONS
IONIZATION
IONS
KEV RANGE
KEV RANGE 10-100
MULTICHARGED IONS
NEON IONS
NONMETALS
RARE GASES