Polarization studies on the dielectronic recombination hypersatellite x-ray lines

The dielectronic recombination of heavy ions has been studied theoretically within the framework of the density matrix theory and the multiconfiguration Dirac-Fock approach. Emphasis was placed especially on the (linear) polarization of the characteristic x-ray emission and how it is affected by the...

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Bibliographic Details
Published in:Journal of physics. Conference series 2010-02, Vol.212 (1), p.012032
Main Authors: Surzhykov, A, Sharma, L, Stohlker, T H, Fritzsche, S
Format: Article
Language:English
Subjects:
Dipoles
Emission
Heavy ions
Ion recombination
Linear polarization
Matrix theory
Multipoles
Physics
Uranium
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Summary:The dielectronic recombination of heavy ions has been studied theoretically within the framework of the density matrix theory and the multiconfiguration Dirac-Fock approach. Emphasis was placed especially on the (linear) polarization of the characteristic x-ray emission and how it is affected by the non-dipole terms in the expansion of the electron–photon interaction operators. In particular, it is found that the interference between the leading electric–dipole (E1) and higher–electric and magnetic–multipole channels may significantly enhance the degree of linear polarization of the Kα hypersatellite lines. Detailed calculations for such a multipole–mixing effect are performed for the decay of the doubly–excited L3/2L3/2 resonances following the dielectronic recombination of (initially) hydrogen–like uranium U91+ ions.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/212/1/012032