Exchange Effects in the Outer Shell Ionisation of Xenon

Lechner, Ute; Keller, S.; Engel, E.; Lüdde, Hans Jürgen; Dreizler, R. M.

doi:10.1007/0-387-27567-3_13

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…The model predicts zero spin asymmetries in the limit of negligible exchange, and in analogy to the "Fine-structure Effect" in excitation [10,11], zero spin asymmetry for the case where the individual finestructure transitions are energetically unresolved. Subsequent measurements on xenon [12,13] and later, more sophisticated calculations [14,15], while confirming a strong spin-dependence in the ionization cross sections as originally predicted, have revealed additional and significant contributions from many-body exchange effects which tend to mask the signatures for a "pure" fine-structure effect. Notwithstanding this fact, that [9] predicts zero spin asymmetry in the absence of exchange means that the spin asymmetry parameter is a very sensitive test of the role and nature of electron exchange in electron-impact-induced ionizing collisions, and a sensitive test to the magnitude of contributions from relativistic effects which can also contribute to a nonzero result, even in the absence of exchange.…”

Section: Fine Structure Effectsupporting

confidence: 63%

Ionization of Atoms with Spin Polarized Electrons

Lower¹,

Bellm²,

Panajotović³

et al. 2006

AIP Conference Proceedings

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On the authors' and employers' webpages: There are no format restrictions; files prepared and/or formatted by AIP or its vendors (e.g., the PDF, PostScript, or HTML article files published in the online journals and proceedings) may be used for this purpose. If a fee is charged for any use, AIP permission must be obtained. An appropriate copyright notice must be included along with the full citation for the published paper and a Web link to AIP's official online version of the abstract. Abstract. The most detailed insight into the process of electron impact-induced ionization of atomic species is provided by measurements in which both kinematical and quantum mechanical variables are determined. Here we describe recent (e,2e) experimental and theoretical studies involving the ionization of xenon and argon by spin-polarized electrons in which the finestructure levels of the ion are energetically resolved. Such investigations shed light on the mechanisms driving the ionization reaction and the role of exchange and relativistic processes.

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Section: Fine Structure Effectsupporting

confidence: 63%

Ionization of Atoms with Spin Polarized Electrons

Lower¹,

Bellm²,

Panajotović³

et al. 2006

AIP Conference Proceedings

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“…Given these assumptions relations (2) and ( 3) are exact. To test the predictions ( 2) and (3) a number of measurements and calculations were performed at both low [4,[6][7][8][9][10][11] and high [12,13] impact-energies.…”

Section: R = σmentioning

confidence: 99%

Spin asymmetries in the electron-impact ionization of Ar(2p)

Bellm

Lower

Kampp³

et al. 2006

J. Phys. B: At. Mol. Opt. Phys.

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Spin- and fine-structure resolved results for the inner-shell ionization of argon are presented. By performing measurements and relativistic scattering calculations under kinematical conditions where the contribution from the exchange between the scattered electrons and the electrons in the residual ion is small, the effect of target fine structure on the measured spin asymmetry has been highlighted. Fully relativistic distorted wave Born approximation calculations are found to be in good agreement with both the spin asymmetry and branching ratio measurements.

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“…To test the predictions (2) and (3) a number of measurements and calculations were performed at both low [5,[8][9][10][11][12][13] and high [7,14] impact energies. A detailed review of that work, and motivation for the present work, has been provided in Ref.…”

Section: R = σmentioning

confidence: 99%