Theory of angular-correlation experiments in electron scattering, including fine structure

Journal Article · Sun Apr 01 04:00:00 EST 1984 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.29.1770· OSTI ID:7051094

Parker, G A; Miller, T M; Mahgerefteh, M; Golden, D E

A theory of electron-impact excitation of atoms in which fine structure is included as a perturbation is presented in detail. Hyperfine structure is included in the target atom but neglected in the electron-atom interaction. Expressions for electron-photon angular-correlation parameters and scattering cross sections are derived in terms of products of complex scattering amplitudes, with emphasis on electron-sodium excitation. Examples are given in which zero-field quantum beats may be observed in electron-photon angular-correlation and differential-cross-section measurements. Some of the interference terms are only observable in angular-correlation experiments. Examples are also given of partial cross sections for electron-impact excitation of state-to-state hyperfine levels in terms of direct- and exchange-scattering amplitudes plus additional terms due to the inclusion of fine-structure effects. The expressions given allow a comparison between the various possible scattering experiments.

• Research Organization: Department of Physics and Astronomy, University of Oklahoma, Norman, Oklahoma 73019
• OSTI ID: 7051094
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 29:4; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
AMPLITUDES
ANGULAR CORRELATION
ATOM COLLISIONS
COLLISIONS
CORRELATIONS
COUPLING
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
EMISSION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FINE STRUCTURE
INELASTIC SCATTERING
INTERMEDIATE COUPLING
L-S COUPLING
METALS
PHOTON EMISSION
SCATTERING
SCATTERING AMPLITUDES
SODIUM