Many-body theory of electron scattering by excited atomic targets: Electron-impact-induced transitions 2 [sup 1,3][ital S][r arrow][ital n] [sup 1,3][ital L] ([ital L]=0,1,2; [ital n]=2,3,4) in helium

Journal Article · Sun Jan 01 00:00:00 EST 1995 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.51.454· OSTI ID:6713534

Cartwright, D C; Csanak, G ^[1]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

A many-body-theory (MBT) formulation for electron scattering by excited electronic states is applied to excitation from the 2 [sup 1,3][ital S] metastable states of helium. The lowest-order MBT for these transitions involves a chanel coupling'' to the ground state of helium as well as a distortion of the free-electron wave function by the ground state of the target, while the distorted-wave approximation (DWA) involves a distortion of the incident and scattered electron wave functions by the initial and final target states, respectively. Results using the first-order many-body theory and DWA are reported here for integral and differential cross sections for excitation from the 2 [sup 1,3][ital S] states to (2,3) [sup 1,3][ital P], 3 [sup 1,3][ital S], and 3 [sup 1,3][ital D] states, and are compared with published experimental and theoretical data.

• OSTI ID: 6713534
• Journal Information: Physical Review A; (United States), Vol. 51:1; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HELIUM
ELECTRON-ATOM COLLISIONS
CALCULATION METHODS
DIFFERENTIAL CROSS SECTIONS
EXCITED STATES
INTEGRAL CROSS SECTIONS
MANY-BODY PROBLEM
METASTABLE STATES
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELEMENTS
ENERGY LEVELS
FLUIDS
GASES
NONMETALS
RARE GASES
664300* - Atomic & Molecular Physics- Collision Phenomena- (1992-)