Doubly excited resonance structures in He photoionization from 1s2s{sup 1,3}S metastable states
- Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089-0484 (United States)
The resonant structures corresponding to selected He sp, 2n{sup {plus_minus}} and 2pnd{sup 1,3}P{sup o} autoionization series below the He{sup +} N=2 threshold, following photoionization from 1s2s{sup 1,3}S metastable states, are examined in detail. Theoretical photoionization cross sections, calculated using a B-spline-based configuration-interaction approach with a length-velocity agreement better than 1{percent}, are presented. A sign change in Fano profile parameters q in 1s2s{sup 1}S{r_arrow}sp,2n{sup +}{sup 1}P transitions along the 2n{sup +} autoionization series is identified and analyzed. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 528054
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 2 Vol. 56; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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