Double photoionization and ionization excitation of the metastable helium S states
- Department of Physics and JILA, Campus Box 440, University of Colorado, Boulder, Colorado80309-0440 (United States)
Theoretical double photoionization cross sections are predicted for He initially in the 1s2s{sup 1}S or {sup 3}S state. The probability for double photoionization is a factor of 6 higher for the {sup 1}S state at 20 eV above the threshold for double ionization and a factor of 3 larger at 80 eV above threshold. We compare these results with each other and with predictions for the high-energy limit to assess the influence of exchange on the double ejection process. Similar comparisons are also made for the process of photoionization-induced excitation of He{sup +}(n). {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 627915
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 5 Vol. 57; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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