Calculation of helium photoionization in the random-phase approximation using square-integrable basis functions
- 1 June 1974
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 9 (6) , 2409-2412
- https://doi.org/10.1103/physreva.9.2409
Abstract
The photoionization cross section of helium is calculated by a numerical analytic continuation of the frequency-dependent polarizability. Approximate values of the polarizability are obtained by an application of the equations-of-motion method. The entire calculation is performed without the use of continuum basis functions. The calculated cross sections agree well with the observed values.Keywords
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