Contributions of excitation autoionization to the electron-impact ionization of Mg/sup +/, Al/sup 2 +/, and Si/sup 3 +/ in the distorted-wave approximation with exchange

Journal Article · Fri Jan 01 00:00:00 EST 1982 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.25.154· OSTI ID:5541835

Griffin, D C; Bottcher, C; Pindzola, M S

The contributions of excitation autoionization to electron-impact ionization in the Na-like ions Mg/sup +/, Al/sup 2 +/, and Si/sup 3 +/ are calculated using the distorted-wave approximation with exchange. Inner-shell excitations of the type 2p/sup 6/3s..-->..2p/sup 5/3snl (n = 3,4; l = 0,1,2) are included. The calculations indicate that the largest contribution should be due to the 2p..-->..3p excitations in all three elements, although the relative importance of this transition decreases with ionic charge. Comparisons of these results with recent experimental measurements indicate that the distorted-wave approximation overestimates the magnitude of the monopole-dominated 2p..-->..np transitions. Possible reasons for this discrepancy between experiment and theory are discussed, and additional calculations and experiments are suggested.

• Research Organization: Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
• OSTI ID: 5541835
• Journal Information: Phys. Rev. A; (United States), Vol. 25:1
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM IONS
ELECTRON-ION COLLISIONS
IONIZATION
MAGNESIUM IONS
SILICON IONS
AUTOIONIZATION
DWBA
EXCHANGE INTERACTIONS
EXCITATION
THEORETICAL DATA
BORN APPROXIMATION
CHARGED PARTICLES
COLLISIONS
DATA
ELECTRON COLLISIONS
ENERGY-LEVEL TRANSITIONS
INFORMATION
INTERACTIONS
ION COLLISIONS
IONS
NUMERICAL DATA
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena