Photoionisation cross section for He in the hyperspherical coordinate method
- 14 September 1980
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic and Molecular Physics
- Vol. 13 (17), L525-L529
- https://doi.org/10.1088/0022-3700/13/17/004
Abstract
The hyperspherical coordinate method developed by Macek, Fano, Lin and Klar (1968 to 1978) to describe two-electron correlations is used for the first time to treat an atomic photoionisation process. Using adiabatic approximations for both the initial and the final state, the cross section for the process He+y to He+1s+e- is calculated and is found to lie 1% higher than the revised experimental data of Samson (1976) at threshold, 4% lower at 1 Ryd above threshold, and 12% lower at 1.9 Ryd above threshold.Keywords
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