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Electronic Doppler effect in resonant Auger decay of CO molecules upon excitation near a shake-up PI resonance (Articolo in rivista)

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Electronic Doppler effect in resonant Auger decay of CO molecules upon excitation near a shake-up PI resonance (Articolo in rivista) (literal)

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Sorensen S. L. , M. Kitajima, T. Tanaka, M. Hoshino, H. Tanaka, Y. Tamenori, R. Sankari, M. N. Piancastelli, K. Ueda, Y. Velkov, I. Minkov, V. Carravetta and F. Gel'mukhanov (2007)
Electronic Doppler effect in resonant Auger decay of CO molecules upon excitation near a shake-up PI resonance
in Physical review. A
(literal)

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

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1) Department of Synchrotron Radiation Research, Institute of Physics, University of Lund, Box 118, SE-221 00 Lund, Sweden 2) Department of Physics, Sophia University, Tokyo 102-8554, Japan 3) Japan Synchrotron Radiation Research Institute, Sayo-gun, Hyogo 679-5198, Japan 4) Department of Physics, Materials Science, University of Turku, Finland 5) Department of Physics, Uppsala University, Box 530, SE-751 21 Uppsala, Sweden 6) Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan 7) School of Biotechnology, Royal Institute of Technology, S-106 91 Stockholm, Sweden 8) Istituto per i Processi Chimico-Fisici, Area della Ricerca del CNR, via G. Moruzzi 1, I-56124 Pisa, Italy (literal)

Titolo

Electronic Doppler effect in resonant Auger decay of CO molecules upon excitation near a shake-up PI resonance (literal)

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 PI 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 C1s(-1)1pi(-1)pi*(2) with a strong dissociative character, and the Doppler splitting of the atomic peak has been reproduced by the simulation. (literal)

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