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Photo double ionization of helium 100 eV and 450 eV above threshold: II. Circularly polarized light

A Knapp1, A Kheifets2, I Bray3, Th Weber1,5,6, A L Landers4, S Schössler1, T Jahnke1, J Nickles1, S Kammer1, O Jagutzki1, L Ph H Schmidt1, M Schöffler1, T Osipov5,6, M H Prior6, H Schmidt-Böcking1, C L Cocke5 and R Dörner1

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We present a joint experimental and theoretical study of the fully differential cross section of the photo double ionization of helium with left and right circularly polarized light at Eexc = 100 eV and 450 eV above the threshold. We analyse angular distributions for the slow electron and the normalized circular dichroism for various energy sharings of the excess energy between the two electrons. The experimental results are well reproduced by convergent close coupling calculations.


PACS

32.80.Fb Photoionization of atoms and ions

Subjects

Atomic and molecular physics

Dates

Issue 6 (28 March 2005)

Received 30 November 2004

Published 7 March 2005



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