Experimental Evidence for Circular Dichroism in the Double Photoionization of 
Helium

Viefhaus, Jens; Avaldi, L.; Snell, György; Wiedenhöft, M.; Hentges, Rainer; Rüdel, Andy; Schäfers, F.; Menke, D.; Heinzmann, U.; Engelns, A.; Berakdar, J.; Klar, H.; Becker, Uwe

doi:10.1103/PhysRevLett.77.3975

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Experimental Evidence for Circular Dichroism in the Double Photoionization of Helium

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Viefhaus, Jens
Fritz Haber Institute, Max Planck Society;

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Snell, György
Fritz Haber Institute, Max Planck Society;
Fakultät für Physik, Universität Bielefeld;

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Wiedenhöft, M.
Fritz Haber Institute, Max Planck Society;

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Hentges, Rainer
Fritz Haber Institute, Max Planck Society;

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Rüdel, Andy
Fritz Haber Institute, Max Planck Society;

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Becker, Uwe
Fritz Haber Institute, Max Planck Society;

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Citation

Viefhaus, J., Avaldi, L., Snell, G., Wiedenhöft, M., Hentges, R., Rüdel, A., et al. (1996). Experimental Evidence for Circular Dichroism in the Double Photoionization of Helium. Physical Review Letters, 77(19), 3975-3978. doi:10.1103/PhysRevLett.77.3975.

Cite as: https://hdl.handle.net/21.11116/0000-0009-ABD6-5

Abstract

Circular dichroism in the double photoionization of He by circularly polarized light has been observed in an angle resolved coincidence experiment at 93.5 eV photon energy. The use of a transmission multilayer, which acts as a quarter-wave plate for the linearly polarized incident light, together with time-of-flight spectrometers, which enable simultaneous detection of all electron pairs, has made the measurements possible. The results show strong dependence of the dichroism on the relative emission angles and the energy sharing between the ejected electrons in good agreement with our numerical calculations.