Photodetachment cross section of He{sup {minus}} (1s2s2p;{sup 4}P{sup o}) in the region of the 1s detachment threshold
- Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 (United States)
- Department of Computer Science, Vanderbilt University, Nashville, Tennessee 37235 (United States)
Using a Spline-Garlekin and inverse iteration method, we studied in detail the photodetachment cross section of the He{sup {minus}} (1s2s2p{sup 4}P{sup o}) state in the region of the 1s detachment threshold. Details of the cross section from threshold to 44 eV are presented. The effects of core excitation and continuum channel coupling are studied. A very narrow 2s3s4s{sup 4}S resonance was found at 42.86600 eV with a width of 0.103 meV. Other resonance structures are also found and analyzed. We studied the 2s2p{sup 2}{sup 4}P resonance state that lies immediately below the 1s threshold. The width and position of this state, obtained from this calculation, are 37.669 eV and 9.850 meV, respectively. This result is in good agreement with other theoretical calculations. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 300153
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 1 Vol. 59; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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