Photoionization with excitation and double photoionization of two-electron atomic targets
Identifieur interne : 00D659 ( Main/Merge ); précédent : 00D658; suivant : 00D660Photoionization with excitation and double photoionization of two-electron atomic targets
Auteurs : A. Kheifets [Australie] ; I. Bray [Australie]Source :
- Journal de physique. IV [ 1155-4339 ] ; 1999.
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- Pascal (Inist)
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- topic : Atome.
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Abstract
We review recent theoretical results on the double photoionization and ionization with excitation of two-electron atomic targets obtained with the convergent close coupling (CCC) method. The method proved to be capable of producing accurate total ionization cross-sections for H-, He, and Li+ in a wide photon energy range from the double ionization threshold to 10 keV where the results go over continuously to the non-relativistic limit of infinite photon energy. By applying scaling laws these results can be extrapolated to all two-electron systems with an arbitrary nucleus charge Z. Present theory can also describe accurately the angular correlation in the two-electron continuum in the form of the fully-resolved triple-differential cross-section (TDCS). The latest results for the TDCS on He agree very well with recent absolute measurements with linearly polarized light.
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<author><name sortKey="Kheifets, A" sort="Kheifets, A" uniqKey="Kheifets A" first="A." last="Kheifets">A. Kheifets</name>
<affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Australian National University, Research School of Physical Sciences</s1>
<s2>Canberra ACT 2601</s2>
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<country>Australie</country>
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<author><name sortKey="Bray, I" sort="Bray, I" uniqKey="Bray I" first="I." last="Bray">I. Bray</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Physics Department, Flinders University, G.P.O. Box 2100</s1>
<s2>Adelaide 5001</s2>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Photoionization with excitation and double photoionization of two-electron atomic targets</title>
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<series><title level="j" type="main">Journal de physique. IV</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Atoms</term>
<term>Circular polarization</term>
<term>Close coupling approximation</term>
<term>Excitation</term>
<term>Helium</term>
<term>Multiple ionization</term>
<term>Photoionization</term>
<term>Polarized radiation</term>
<term>Theoretical study</term>
<term>Total cross sections</term>
<term>Triply differential cross section</term>
<term>Two electron system</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>3280F</term>
<term>Etude théorique</term>
<term>Approximation couplage proche</term>
<term>Photoionisation</term>
<term>Ionisation multiple</term>
<term>Excitation</term>
<term>Atome</term>
<term>Système 2 électrons</term>
<term>Section efficace triplement différentielle</term>
<term>Section efficace totale</term>
<term>Rayonnement polarisé</term>
<term>Polarisation circulaire</term>
<term>Hélium</term>
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<front><div type="abstract" xml:lang="en">We review recent theoretical results on the double photoionization and ionization with excitation of two-electron atomic targets obtained with the convergent close coupling (CCC) method. The method proved to be capable of producing accurate total ionization cross-sections for H-, He, and Li<sup>+</sup>
in a wide photon energy range from the double ionization threshold to 10 keV where the results go over continuously to the non-relativistic limit of infinite photon energy. By applying scaling laws these results can be extrapolated to all two-electron systems with an arbitrary nucleus charge Z. Present theory can also describe accurately the angular correlation in the two-electron continuum in the form of the fully-resolved triple-differential cross-section (TDCS). The latest results for the TDCS on He agree very well with recent absolute measurements with linearly polarized light.</div>
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