We present a simple half-collision model that allows the approximate calculation of absolute cross sections for triple ionization as well as cross-section ratios σ3+/σ2+ of lithium by photon impact. The model decomposes the three-electron breakup process into a double ionization of the two inner electrons followed by electron-electron half-scattering of the receding electrons at the residual ``spectator'' 2s electron. We find surprisingly good agreement with recent experimental data.
Physical Review A
- Pub Date:
- February 2001
- Photoionization of atoms and ions;
- Electronic excitation and ionization of atoms;
- Other topics in atomic and molecular collision processes and interactions