Dielectronic recombination on and electron-impact excitation of heliumlike argon

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.44.223· OSTI ID:5730382

Ali, R; Bhalla, C P; Cocke, C L; Schulz, M; Stockli, M ^[1]

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1. J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604 (US)

We have measured cross sections for {Delta}{ital n}=1 dielectronic recombination (DR) on He-like argon and found good agreement with theoretical calculations based on the Hartree-Fock atomic model. Experimental absolute cross sections were obtained by using the electron-energy dependence of yields of He-like and Li-like argon ions from the Kansas State University electron-beam ion source to measure the ratio of the DR cross section on He-like argon to the electron-impact-ionization cross section of Li-like argon and normalizing to the latter. The {ital K} x-ray emission spectra due to {Delta}{ital n}=1,2 DR and {ital n}=1{r arrow}2 electron-impact excitation of He-like argon were also observed with a Si(Li) detector placed at 0{degree} relative to the electron-beam direction. By normalizing to the theoretical {ital KLL} integrated DR differential cross section, we obtained differential and partial differential DR cross sections and differential electron-impact excitation cross sections. We found good agreement with Hartree-Fock calculations for DR and with distorted-wave calculations for electron-impact excitation.

• OSTI ID: 5730382
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 44:1; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
ATOMS
CHARGED PARTICLES
CHEMICAL ANALYSIS
COLLISIONS
CROSS SECTIONS
DATA
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ELECTRONIC STRUCTURE
ENERGY-LEVEL TRANSITIONS
EXCITATION
INFORMATION
ION COLLISIONS
IONS
ISOELECTRONIC ATOMS
K SHELL
MULTICHARGED IONS
NONDESTRUCTIVE ANALYSIS
NUMERICAL DATA
RECOMBINATION
THEORETICAL DATA
X-RAY EMISSION ANALYSIS