Multiplet exchange Auger transitions following resonant Auger decays in Ne 1s photoexcitation

Abstract

Secondary electron emission with very low kinetic energy (KE) has been measured in the Ne 1s photoexcitation region. A new decay channel for Auger transitions following Ne 1s to 3p excitation has been identified using a two-dimensional mapping technique, in which slow Auger electron signals are displayed as functions of electron kinetic energy and photon energy. Electrons with about 0.68 eV KEs have been ascribed to multiplet exchange Auger electrons from the 2p−2(1S)3d state. This state is formed through the resonant Auger transition from the 1s−13p state, in which the excited 3p electron changes its azimuthal quantum number. Another cascade Auger decay of multiplet exchanging was found as electron emission of about 2.0 eV KEs; 2p−2(1S)4p → 2p−2(3P) + e−. Several cascade decays were found to occur via the photoexcitation into 1s−14p and 1s−15p states.