Total cross sections of electron-impact ionization of Ar sup 7+

Journal Article · Sat Feb 29 23:00:00 EST 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.45.2929· OSTI ID:7234448

Zhang, Y; Reddy, C B; Smith, R S; Golden, D E; Mueller, D W ^[1]; Gregory, D C ^[2]

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1. Department of Physics, University of North Texas, Denton, Texas 76203-5368 (United States)
2. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372 (United States)

The electron-impact single-ionization cross section of Ar{sup 7+} has been measured from 18 to 1186 eV using a crossed-beams technique. The present results are higher than previous measurements at the higher energies and are in good agreement with recent distorted-wave calculations that include contributions from excitation autoionization. Below the threshold for direct ionization at 144 eV, the cross section contains contributions due to space-charge modulation and excitation of metastable ions in the target beam into autoionizing states. These transitions are predominantly spin allowed and dipole forbidden. Scaling laws for sodiumlike ions are discussed.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7234448
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 45:5; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY RANGE
ION COLLISIONS
IONIZATION
IONS
KEV RANGE
KEV RANGE 01-10
MULTICHARGED IONS
SCALING LAWS