Photo double ionization of helium 100 eV and 450 eV above threshold: II

doi:10.1088/0953-4075/38/6/002

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

A Knapp et al 2005 J. Phys. B: At. Mol. Opt. Phys. 38 635-643 doi: 10.1088/0953-4075/38/6/002

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A Knapp¹, A Kheifets², I Bray³, Th Weber^1,5,6, A L Landers⁴, S Schössler¹, T Jahnke¹, J Nickles¹, S Kammer¹, O Jagutzki¹, L Ph H Schmidt¹, M Schöffler¹, T Osipov^5,6, M H Prior⁶, H Schmidt-Böcking¹, C L Cocke⁵ and R Dörner¹
¹ Institut für Kernphysik, Universität Frankfurt, August-Euler-Str 6, D-60486 Frankfurt, Germany
² Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia
³ Centre for Atomic, Molecular and Surface Physics, Murdoch University, Perth 6150, Australia
⁴ Physics Department, Auburn University, Auburn, AL 36849, USA
⁵ Deptartment of Physics, Kansas State University, Cardwell Hall, Manhattan KS 66506, USA
⁶ Lawrence Berkeley National Lab., Berkeley, CA 94720, USA
E-mail: doerner@atom.uni-frankfurt.de

Abstract. 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 E_exc = 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.

Print publication: Issue 6 (28 March 2005)
Received 30 November 2004
Published 7 March 2005

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

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