Helium atom in the monochromatic electromagnetic field |
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| Authors: | I. A. Ivanov A. S. Kheifets |
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| Affiliation: | (1) Research School of Physical Sciences and Engineering, The Australian National University, Canberra, ACT, 0200, Australia |
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| Abstract: | We apply a non-perturbative procedure for the calculation of the total photoionization cross-section of two-electron atomic systems. The procedure is based on the Floquet-Fourier representation of the time-dependent Schr?dinger equation. With the use of the Hylleraas-type basis functions, the total photoionization cross-sections obtained are within the accuracy of a fraction of a percent, which, we believe, is the most accurate estimate for the cross-sections available. The total photoionization cross-sections for neutral helium deviate notably from the benchmark experimental data [J.A.R. Samson et al., J. Phys. B 27, 887 (1994)]. |
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| Keywords: | 32.80.Fb Photoionization of atoms and ions 32.80.-t Photon interactions with atoms 32.80.Rm Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states) |
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