Double KL ionization in Al, Ca, and Co targets bombarded by low-energy electrons
Abstract
The cross sections for the production of double K and L vacancy states in Al, Ca, and Co as a result of electron bombardment were determined for impact energies ranging from the double excitation threshold up to 20 keV. The cross sections were derived from the measured intensity ratios IKαL(1):IKαL(0) of the satellite-to-parent-diagram x-ray lines. The specific contributions of the shake and two-step electron-electron processes could be probed by comparing the relative satellite yields observed in the electron-induced spectra to those obtained by photoionization. In particular the energy-dependent cross sections for double K and L excitation resulting from two-step-two processes could be deduced. The measurements were performed by means of high-resolution x-ray spectroscopy, using a reflection-type bent crystal spectrometer.
- Publication:
-
Physical Review A
- Pub Date:
- October 2002
- DOI:
- 10.1103/PhysRevA.66.042713
- Bibcode:
- 2002PhRvA..66d2713M
- Keywords:
-
- 32.80.Fb;
- 32.30.Rj;
- 34.50.Fa;
- 34.80.Dp;
- Photoionization of atoms and ions;
- X-ray spectra;
- Electronic excitation and ionization of atoms;
- Atomic excitation and ionization by electron impact