Distorted-wave impulse approximation for symmetric (e,2e) measurements on helium

Journal Article · Fri Oct 31 23:00:00 EST 1986 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.34.4426· OSTI ID:5085905

McCarthy, I E; Mitroy, J

The factorized distorted-wave impulse approximation (DWIA) is used to analyze the momentum profiles of the noncoplanar symmetric (e,2e) transitions from the helium-atom ground state to the He/sup +/ n = 1 and n = 2 states. The overlap function used for the calculation of the DWIA cross section is derived from a very accurate configuration-interaction wave function of the helium-atom ground state. The DWIA cross sections provide a better fit to the experimental data than the equivalent plane-wave impulse-approximation cross sections, although when the n = 1 to (summed) n = 2 cross-section ratio is depicted, this does not seem to be the case.

• Research Organization: Institute for Atomic Studies, The Flinders University of South Australia, Bedford Park, South Australia, Australia 5042
• OSTI ID: 5085905
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 34:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
CONFIGURATION INTERACTION
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
FUNCTIONS
GASES
GROUND STATES
HELIUM
IMPULSE APPROXIMATION
IONIZATION
NONMETALS
RARE GASES
WAVE FUNCTIONS