Calculation of atomic photoionization using the nonsingular convergent close-coupling method
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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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Sokell, E.; Bolognesi, P.; Kheifets, A.; Bray, Igor; Safgren, S.; Avaldi, L. (2014)We observe a two-electron interference effect in the symmetrized amplitude of the resonant double photoionization of Mg which was predicted theoretically, but never before observed experimentally. This observation is based ...
Sokell, E.; Bolognesi, P.; Kheifets, A.; Bray, Igor; Safgren, S.; Avaldi, L. (2014)The signature of the target wavefunction has been observed in the symmetrized amplitude of the resonant double photoionization of Mg. This observation is based on our experimental study of angle-resolved double photoionization ...
Sokell, E.; Bolognesi, P.; Kheifets, A.; Bray, Igor; Safgren, S.; Avaldi, L. (2013)The double photoionization of Mg has been studied experimentally and theoretically in a kinematic where the two photoelectrons equally share the excess energy. The observation of a symmetrized gerade amplitude, which ...