Calculation of atomic photoionization using the nonsingular convergent close-coupling method

A. W. Bray; A. S. Kheifets; I. Bray

doi:10.1103/PhysRevA.95.053405

Calculation of atomic photoionization using the nonsingular convergent close-coupling method

A. W. Bray, A. S. Kheifets, I. Bray

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Abstract

The convergent close-coupling method for atomic photoionization is modified by treating the singularity in the Green's function analytically. The resultant close-coupling equations are then free of any singularities, and can be solved at all incident energies including at the exact thresholds. The utility and superiority of the approach is demonstrated by considering single photoionization of the ground state of helium at photoelectron energies from the ionic n=1,2,3 thresholds through to 1 keV. For completeness, the double photoionization cross section is also presented.

Original language	English
Article number	053405
Journal	Physical Review A
Volume	95
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevA.95.053405
Publication status	Published - 12 May 2017

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abstract = "The convergent close-coupling method for atomic photoionization is modified by treating the singularity in the Green's function analytically. The resultant close-coupling equations are then free of any singularities, and can be solved at all incident energies including at the exact thresholds. The utility and superiority of the approach is demonstrated by considering single photoionization of the ground state of helium at photoelectron energies from the ionic n=1,2,3 thresholds through to 1 keV. For completeness, the double photoionization cross section is also presented.",

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AB - The convergent close-coupling method for atomic photoionization is modified by treating the singularity in the Green's function analytically. The resultant close-coupling equations are then free of any singularities, and can be solved at all incident energies including at the exact thresholds. The utility and superiority of the approach is demonstrated by considering single photoionization of the ground state of helium at photoelectron energies from the ionic n=1,2,3 thresholds through to 1 keV. For completeness, the double photoionization cross section is also presented.

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Calculation of atomic photoionization using the nonsingular convergent close-coupling method

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