P Bolognesi et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 3193 doi:10.1088/0953-4075/34/15/321
Complementary TDCS for the photo-double ionization of He at 40 eV above the threshold in unequal energy-sharing conditions
P Bolognesi1, R Camilloni1, M Coreno2, G Turri2,3,6, J Berakdar4, A S Kheifets5 and L Avaldi1
Show affiliations Photo-double ionization (PDI) of helium at 40 eV above the threshold has been studied for unequal energy-sharing in the complementary kinematics obtained in two measurements by the interchange of the kinetic energies E1
E2 of the two photoelectrons. The triple differential cross sections (TDCS) were measured in the plane perpendicular to the photon direction using the multicoincidence end-station of the gas-phase photoemission beam-line of the Elettra storage ring. The measured TDCSs were compared with previous experimental results using a practical parametrization proposed by Cvejanovic and Reddish (2000 J. Phys. B: At. Mol. Opt. Phys. 33 4691) and with predictions of the 3C and convergent close-coupling calculations. Satisfactory agreement with the previous experimental data was found. The comparison with the two theoretical models shows that the TDCSs is the complementary kinematics still present a challenge for PDI theory.
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Issue 15 (14 August 2001)
Received 8 May 2001, in final form 26 June 2001
Published 23 July 2001
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Complementary TDCS for the photo-double ionization of He at 40 eV above the threshold in unequal energy-sharing conditions
P Bolognesi et al 2001 J. Phys. B: At. Mol. Opt. Phys. 34 3193
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