Absolute cross-section measurements for electron-impact ionization of doubly charged ions Ti/sup 2 +/, Fe/sup 2 +/, Ar/sup 2 +/, Cl/sup 2 +/, and F/sup 2 +/

Journal Article · Wed May 01 00:00:00 EDT 1985 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.31.2905· OSTI ID:5748644

Mueller, D W; Morgan, T J; Dunn, G H; Gregory, D C; Crandall, D H

Measurements have been made of the cross section for electron-impact single ionization of the ions Ti/sup 2 +/, Fe/sup 2 +/, Ar/sup 2 +/, Cl/sup 2 +/, and F/sup 2 +/, spanning the range of energies from below threshold to 1500 eV. Indirect processes such as excitation-autoionization contribute substantially to the cross section for Ti/sup 2 +/, while such contributions are less pronounced for the other species. Comparisons with available theoretical predictions and with the Lotz semiempirical formula are presented. Expansion coefficients and formulas for generating ionization rate coefficients in the temperature range 10/sup 4/

• Research Organization: Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colorado 80309
• OSTI ID: 5748644
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 31:5; 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
ATOMIC IONS
BEAMS
CHARGED PARTICLES
CHLORINE IONS
COLLISIONS
CROSS SECTIONS
ELECTRON BEAMS
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
FLUORINE IONS
ION BEAMS
ION COLLISIONS
IONIZATION
IONS
IRON IONS
LEPTON BEAMS
MULTICHARGED IONS
PARTICLE BEAMS
TITANIUM IONS