Interference between Scattered and Ejected Electrons in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>e</mml:mi><mml:mo>−</mml:mo><mml:mi mathvariant="normal">He</mml:mi></mml:math>Collisions: a New Probe for Coherence Studies

Abstract

We present a method for the study of coherences between states of different excitation energies. This method is based on the occurrence of interferences between scattered and ejected electrons resulting from the electron impact excitation of autoionizing states. Preliminary measurements are presented which for the first time show such interference effects.