B M Lagutin et al 1996 J. Phys. B: At. Mol. Opt. Phys. 29 937 doi:10.1088/0953-4075/29/5/008
Cross sections and angular distributions of the photoelectron correlation satellites of the Xe atom
B M Lagutin
, I D Petrov, V L Sukhorukov, S B Whitfield
, B Langer§, J Viefhaus||, R Wehlitz¶, N Berrah§, W Mahler|| and U Becker||
A theoretical and experimental study of the behaviour of the correlation satellites arising during 5s photoionization of xenon is presented. Many-body perturbation theory and configuration-interaction techniques have been applied to calculate the wavefunctions of the Xe II ionic states. An expression for the angular distribution parameter of the photoelectrons taking into account final-ionic-state configuration interaction is derived. Photoionization cross sections and angular distribution parameters were calculated for the 5s main line and the majority of the satellite lines and compared with our high-resolution measurements and earlier lower resolution measurements.
The differences in the angular distribution parameter dependence on the photon energy for the 5s main line and satellites were analysed in terms of their origin. The most important mechanisms are: interference of several photoionization channels characterizing different orbital momenta of the photoelectron, the mixture of terms with different total orbital momenta in the final ionic state, and the dependence of the photoelectron wavefunctions on the total momentum of the photoelectrons.
- PACS
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32.80.Fb Photoionization of atoms and ions
31.15.V- Electron correlation calculations for atoms, ions and molecules
- Subjects
- Dates
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Issue 5 (14 March 1996)
Received 9 August 1995
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Cross sections and angular distributions of the photoelectron correlation satellites of the Xe atom
B M Lagutin et al 1996 J. Phys. B: At. Mol. Opt. Phys. 29 937
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