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Electron correlation and the cross sections for electron capture from He: The impulse approximation. [25 keV to 3. 5 MeV]

Journal Article · · Phys. Rev., A; (United States)
;
Electron-capture cross sections have been evaluated for high-velocity protons impinging on a ground-state helium target. The scattering matrix element was formulated within the quantum-mechanical impulse approximation, and the resulting cross sections were examined as a function of various levels of sophistication for the description of the target atom. The helium wave functions used here were of a simple one-parameter (lambda) variational form, a Hartree--Fock (HF) equivalent function and, finally, a configuration-interaction (CI) description. The projectile energy ranged from 25 keV to 3.5 MeV and, where possible, the cross sections were compared with experiment. (AIP)
Research Organization:
Department of Physics, University of Leicester, Leicester, England
OSTI ID:
7313166
Journal Information:
Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 15:1; ISSN PLRAA
Country of Publication:
United States
Language:
English

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Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
CAPTURE
CATIONS
CHARGED PARTICLES
COLLISIONS
CONFIGURATION INTERACTION
CORRELATIONS
CROSS SECTIONS
CRYOGENIC FLUIDS
ELECTRON CAPTURE
ELECTRON CORRELATION
ELEMENTS
ENERGY RANGE
FLUIDS
FUNCTIONS
HARTREE-FOCK METHOD
HELIUM
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
IMPULSE APPROXIMATION
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
MATRICES
MEV RANGE
MEV RANGE 01-10
NONMETALS
RARE GASES
S MATRIX
VARIATIONAL METHODS
WAVE FUNCTIONS