Problems associated with the measurement of coherence parameters: Superelastic electron scattering by laser-excited /sup 138/Ba(. 6/ital s/6/ital p/ /sup 1/P/sub 1/) atoms

Journal Article · Thu Jun 01 04:00:00 EDT 1989 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.39.6022· OSTI ID:6393290

Zetner, P W; Trajmar, S; Csanak, G; Clark, R E. H.

Measurements of superelastic scattering of electrons by laser-excited /sup 138/Ba(. . .6/ital s/6/ital p/ /sup 1/P/sub 1/) atoms were carried out. An asymmetry observed by us and previously by Register /ital et/ /ital al/. (Phys. Rev. A 28, 151 (1983)) has been explained using a model of scattering from a target with finite dimensions. This model employed coherence parameters which we calculated in the distorted-wave approximation. The results indicated that the interpretation of coherence experiments in terms of scattering from a pointlike target can lead to serious errors in the deduction of coherence parameters at low scattering angles.

• Research Organization: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109(US); Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 6393290
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 39:11; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
AMPLIFICATION
AMPLITUDES
ATOM COLLISIONS
BARIUM
COLLISIONS
DATA ANALYSIS
ELECTROMAGNETIC RADIATION
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
ERRORS
EXCITATION
GAIN
LASER RADIATION
METALS
RADIATIONS
SCATTERING AMPLITUDES