Signatures of projectilenucleus scattering in three-dimensional (e,2e) cross sections for argon

Xueguang Ren (1) , Arne Senftleben (1) , Thomas Pflüger (1) , Alexander Dorn (1) , Klaus Bartschat (2) , Joachim Ullrich (1)

1 MPIK - Max-Planck-Institut für Kernphysik
2 Department of Physics and Astronomy [Des Moines]

Electron impact ionization (E 0 = 195 eV) of the 3p-orbital in Argon is investigated experimentally and theoretically. The triple-differential cross sections (TDCS) obtained using a multi-particle momentum spectrometer (reaction microscope) cover more than 80 % of the full solid angle for the slow emitted electron up to an energy of 25 eV and a range of projectile scattering angles from −5° to −15°. Inside the projectile scattering plane the TDCS shape is in rather good agreement with a hybrid distorted-wave plus R-matrix (DWBA-RM) calculation. Outside the scattering plane relatively strong electron emission is observed which is reproduced by theory in magnitude but not in shape. A systematic study of the TDCS behavior and structure in this region indicates that its origin lies in high-order projectile−target interaction.

Mots clés: Physical Sciences

Xueguang Ren, Arne Senftleben, Thomas Pflüger, Alexander Dorn, Klaus Bartschat, et al.. Signatures of projectilenucleus scattering in three-dimensional (e,2e) cross sections for argon. Journal of Physics B: Atomic, Molecular and Optical Physics, 2010, 43 (3), pp.35202. ⟨10.1088/0953-4075/43/3/035202⟩. ⟨hal-00569865⟩