Atomic Auger Doppler effects upon emission of fast photoelectrons

Marc Simon, Ralph Püttner, Tatiana Marchenko, Renaud Guillemin, Rajesh K. Kushawaha, Loïc Journel, Gildas Goldsztejn, Maria Novella Piancastelli (), James M. Ablett, Jean-Pascal Rueff and Denis Céolin
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Marc Simon: CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement
Ralph Püttner: Institut für Experimentalphysik, Freie Universität Berlin
Tatiana Marchenko: CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement
Renaud Guillemin: CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement
Rajesh K. Kushawaha: CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement
Loïc Journel: CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement
Gildas Goldsztejn: CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement
Maria Novella Piancastelli: CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement
James M. Ablett: Synchrotron SOLEIL, L’Orme des Merisiers
Jean-Pascal Rueff: CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement
Denis Céolin: Synchrotron SOLEIL, L’Orme des Merisiers

Nature Communications, 2014, vol. 5, issue 1, 1-5

Abstract: Abstract Studies of photoemission processes induced by hard X-rays including production of energetic electrons have become feasible due to recent substantial improvement of instrumentation. Novel dynamical phenomena have become possible to investigate in this new regime. Here we show a significant change in Auger emission following 1s photoionization of neon, which we attribute to the recoil of the Ne ion induced by the emission of a fast photoelectron. Because of the preferential motion of the ionized Ne atoms along two opposite directions, an Auger Doppler shift is revealed, which manifests itself as a gradual broadening and doubling of the Auger spectral features. This Auger Doppler effect should be a general phenomenon in high-energy photoemission of both isolated atoms and molecules, which will have to be taken into account in studies of other recoil effects such as vibrational or rotational recoil in molecules, and may also have consequences in measurements in solids.

Date: 2014
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DOI: 10.1038/ncomms5069

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