Indirect processes in electron impact ionization of Kr[sup 24+] and Kr[sup 25+]

Conference · Sat Jun 05 04:00:00 EDT 1993 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:6214379

Chen, M H; Reed, K J ^[1]

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1. High Temperature Physics Division Lawrence Livermore National Laboratory Livermore, California 94550 (United States)

Electron-impact ionization cross sections have been calculated for magnesiumlike Kr[sup 24+] and sodiumlike Kr[sup 25+]. The contributions of excitation-autionization and resonant excitation double autoionization (REDA) were included, in addition to the cross sections for direct ionization of a 3s electron. The calculations were carried out using the relativistic distorted wave methods and the multiconfiguration Dirac-Fock model. For Kr[sup 25+], the total cross section is about 5 times the direct ionization cross section. For Kr[sup 24+], indirect contribution is about 2.5 times the direct ionization cross section. The REDA process produces many strong resonances and contributes about 20% to the average ionization cross section.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6214379
• Report Number(s): CONF-920948--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 274:1
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL EQUATIONS
DIRAC EQUATION
DISTORTED WAVE THEORY
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EXCITATION
ION COLLISIONS
IONIZATION
IONS
KRYPTON IONS
MULTICHARGED IONS
PARTIAL DIFFERENTIAL EQUATIONS
WAVE EQUATIONS