Electron-impact ionization and recombination in positive ions

Conference · Tue May 01 00:00:00 EDT 1990 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:6162352

Griffin, D C ^[1]; Pindzola, M S ^[2]

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1. Department of Physics, Rollins College, Winter Park, FL (USA)
2. Department of Physics, Auburn University, Auburn, AL (USA)

Theoretical calculations of electron-impact ionization and recombination in positively charged ions are reviewed and compared to cross section measurements. In the case of ionization, the contributions of excitation autoionization and resonant recombination followed by double autoionization are considered. The excitation-autoionization contributions can dominate the total ionization cross section even for highly ionized species. In addition, we present the results of fully relativistic calculations of ionization cross sections obtained from lowest-order QED theory for H-like and He-like uranium. Finally, we consider the contribution of dielectronic recombination (DR) to electron-impact recombination. Comparison of theoretical calculations of DR for He-like and Li-like carbon and oxygen ions with recent high-resolution, merged-beam measurements, using the electron cooler at Aarhus, seem to indicate that total DR cross sections can be accurately determined from the isolated-resonance approximation. The effects of electric fields on DR are briefly discussed.

• DOE Contract Number: AC05-84OR21400; FG05-86ER53217
• OSTI ID: 6162352
• Report Number(s): CONF-891052--
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (USA), Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Vol. 206:1; ISSN APCPC; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
CARBON IONS
CHARGED PARTICLES
COLLISIONS
CORRECTIONS
CROSS SECTIONS
ELECTRIC FIELDS
ELECTRODYNAMICS
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
FIELD THEORIES
ION COLLISIONS
IONIZATION
IONS
MULTICHARGED IONS
OXYGEN IONS
PLASMA
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
RADIATIVE CORRECTIONS
RECOMBINATION
TOTAL CROSS SECTIONS
URANIUM IONS