Cross sections for inner-shell excitation of Na-like ions
- 1 November 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 26 (5), 2545-2550
- https://doi.org/10.1103/physreva.26.2545
Abstract
The contributions of excitation autoionization to electron-impact ionization in the Nalike and are calculated using a two-state close-coupling approximation. Inner-shell excitations of the type are included. The contributions of resonant-excitation double autoionization are estimated from a three-state close-coupling approximation with the aid of quantum-defect-theory analysis. These contributions explain the absence of the largest predicted excitation-autoionization step in the measurements of Crandall et al. Predictions for also lead to similar agreement with experiment. We conclude that the experiments of Crandall et al. for the total ionization cross sections for , , and by electron impact include measurements of the physical processes of direct-ionization, inner-shell excitation autoionization, and inner-shell resonant-excitation double autoionization.
Keywords
This publication has 14 references indexed in Scilit:
- Born-approximation electron ionization cross sections forand some ions of the Na isoelectronic sequencePhysical Review A, 1982
- Absolute cross-section measurements for electron-impact ionization of Na-like ions—, , andPhysical Review A, 1982
- Contributions of excitation autoionization to the electron-impact ionization ofMg+,Al2+, andSi3+in the distorted-wave approximation with exchangePhysical Review A, 1982
- Electron impact ionization ofby resonant excitation double Auger ionizationPhysical Review A, 1981
- Cross sections and rates for direct electron-impact ionization of sodiumlike ionsPhysical Review A, 1981
- A general program to calculate atomic continuum processes using the NIEM methodComputer Physics Communications, 1981
- Electron Impact Ionization of Multicharged IonsPhysica Scripta, 1981
- CIV3 — A general program to calculate configuration interaction wave functions and electric-dipole oscillator strengthsComputer Physics Communications, 1975
- Roothaan-Hartree-Fock atomic wavefunctionsAtomic Data and Nuclear Data Tables, 1974
- Quantum defect theory VII. Analysis of resonance structuresJournal of Physics B: Atomic and Molecular Physics, 1969