Electron-energy and -angular distributions in the double photoionization of helium
作者： R. Wehlitz , F. Heiser , O. Hemmers , B. Langer , A. Menzel
DOI: 10.1103/PHYSREVLETT.67.3764
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摘要: Photoelectron spectra of helium have been measured at different angles and various energies above the double-ionization threshold up to 120 eV investigate behavior energy angular distributions, shake-off electrons. Both distributions clearly show a U-shaped profile which turns flat curve near pointing uniform intensity distribution over kinetic for all in this excitation regime. Our results angular-distribution asymmetry parameter indicate qualitative agreement with theoretical predictions but fail provide them quantitatively.
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