Electronic Doppler effect in resonant Auger decay of CO molecules upon excitation near a shake-up Π resonance

S. L. Sorensen, M. Kitajima, T. Tanaka, M. Hoshino, H. Tanaka, Y. Tamenori, R. Sankari, M. N. Piancastelli, K. Ueda, Y. Velkov, I. Minkov, V. Carravetta, F. Gel'Mukhanov

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Abstract

We present an experimental observation of the electronic Doppler effect in resonant Auger spectra upon core excitation slightly above the carbon K edge of the CO molecule. Thus the electronic Doppler effect has been identified in above-threshold excitation, and in a transition of Π symmetry. Ab initio calculations of the potential energy curves of the relevant states of CO and the wave packet technique have been employed to provide a theoretical background to the experimental studies. The weak feature around 299.4 eV in the photoabsorption spectrum, whose decay has been investigated by the present experiment, is assigned to double (core-valence) excitations to C 1s shake-up states 1 sC -1 1 π-1 π*2 with a strong dissociative character, and the Doppler splitting of the atomic peak has been reproduced by the simulation.

Original languageEnglish
Article number062704
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume76
Issue number6
DOIs
Publication statusPublished - 2007 Dec 14

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Sorensen, S. L., Kitajima, M., Tanaka, T., Hoshino, M., Tanaka, H., Tamenori, Y., Sankari, R., Piancastelli, M. N., Ueda, K., Velkov, Y., Minkov, I., Carravetta, V., & Gel'Mukhanov, F. (2007). Electronic Doppler effect in resonant Auger decay of CO molecules upon excitation near a shake-up Π resonance. Physical Review A - Atomic, Molecular, and Optical Physics, 76(6), [062704]. https://doi.org/10.1103/PhysRevA.76.062704