Electron Impact Double Ionization of Helium from [e, (3-1)e] Experiments}


Abstract: Electron impact double ionization of helium has been observed in an [e,(3-1)e] experiment at an incident electron energy of 200 eV. 110 eV scattered and 10 eV ejected electrons are observed in coincidence without detection of the second ejected electron (1 eV). Present and previous observations are discussed.

Keywords: Double Ionization, (e,2e), [e,(3-1)e], Coincidence Detection, Electron Impact

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