dorsal/arxiv
View SchemaCalculations of total photoionization cross-section for^M two-electron atomic systems
| Authors | I. A. Ivanov, A. S. Kheifets |
|---|---|
| Categories | |
| ArXiv ID | physics/0502018 |
| URL | https://arxiv.org/abs/physics/0502018 |
Abstract
We outline a non-perturbative procedure for calculating the total photoionization cross-section of two-electron atomic systems. The procedure is based on the Floquet-Fourie representation of the solution of the time-dependent Schrodinger equation. The Floquet-Fourie ansatz produces a set of equations which is recast into a generalized eigenvalue problem by means of the complex rotation procedure. With the use of the Hylleraas-type basis functions, the total photoionization cross-sections are obtained within the accuracy of a fraction of a percent. The total photoionization cross-sections for neutral helium are in good agreement with the convergent close-coupling calculations of Kheifets and Bray [Phys. Rev. A {\bf 58}, 4501 (1999)] but deviate notably from the experimental data of Samson {\em et al.} [J. Phys. B {\bf 27} 887 (1994)].
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"abstract": "We outline a non-perturbative procedure for calculating the total\nphotoionization cross-section of two-electron atomic systems. The procedure is\nbased on the Floquet-Fourie representation of the solution of the\ntime-dependent Schrodinger equation. The Floquet-Fourie ansatz produces a set\nof equations which is recast into a generalized eigenvalue problem by means of\nthe complex rotation procedure. With the use of the Hylleraas-type basis\nfunctions, the total photoionization cross-sections are obtained within the\naccuracy of a fraction of a percent. The total photoionization cross-sections\nfor neutral helium are in good agreement with the convergent close-coupling\ncalculations of Kheifets and Bray [Phys. Rev. A {\\bf 58}, 4501 (1999)] but\ndeviate notably from the experimental data of Samson {\\em et al.} [J. Phys. B\n{\\bf 27} 887 (1994)].",
"arxiv_id": "physics/0502018",
"authors": [
"I. A. Ivanov",
"A. S. Kheifets"
],
"categories": [
"physics.atom-ph"
],
"title": "Calculations of total photoionization cross-section for^M two-electron atomic systems",
"url": "https://arxiv.org/abs/physics/0502018"
},
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