Electron-impact ionization of atomic hydrogen: Comparison of asymmetric (e,2e) measurements with theories

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.30.758· OSTI ID:6795013

Lohmann, B; McCarthy, I E; Stelbovics, A T; Weigold, E

Differential cross sections have been measured for the electron-impact ionization of atomic hydrogen, using the (e,2e) technique with coplanar asymmetric kinematics. The experiments were performed at an incident energy of 250 eV with the slow outgoing electron being detected at energies of 5, 10, and 14 eV, for scattering angles of the fast outgoing electron of 3/sup 0/, 5/sup 0/, and 8/sup 0/. The data are compared with differential cross sections calculated with use of the factorized distorted-wave impulse approximation, the plane-wave impulse approximation, and three recent Born-approximation calculations, consisting of first-order Born, second-order Born, and eikonal Born series treatments. In the distorted-wave impulse approximation calculations we investigate the effect of using different descriptions for the fast outgoing electron. Comparison of the data and the calculated cross sections indicates reasonable agreement with the distorted-wave impulse calculations, and good agreement with the second-order and eikonal Born series calculations.

• Research Organization: Institute for Atomic Studies, School of Physical Sciences, The Flinders University of South Australia, Adelaide, South Australia 5042, Australia
• OSTI ID: 6795013
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 30:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AMPLITUDES
ANGULAR DISTRIBUTION
ATOM COLLISIONS
BORN APPROXIMATION
COLLISIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELECTRON COLLISIONS
ELECTRON SPECTRA
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 10-100
EXPERIMENTAL DATA
FUNCTIONS
HYDROGEN
INFORMATION
IONIZATION
NONMETALS
NUMERICAL DATA
SCATTERING AMPLITUDES
SPECTRA
WAVE FUNCTIONS