Autoionization Resonances in the Simultaneous Excitation-Ionization of Helium

Authors: MEVLUT DOGAN, ALBERT CROWE

Abstract: The effect of autoionizing states on excitation-ionization processes has been investigated experimentally by observation of the electron impact ionization process leading to He^{ + }(2p) with the excitation energy region in helium corresponding to doubly excitated states above the second ionization threshold. Also, the process arising from the decay of the doubly excited `parity unfavoured' (2p^{2})^{3}P state of helium, is studied.

Keywords: Autoionization, Ionization-Excitation, Coincidence Detection, Angular Correlation, Helium

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