Photoelectron recoil in CO in the x-ray region up to 7 keV

E. Kukk, T. D. Thomas, K. Ueda, D. Céolin, S. Granroth, K. Kooser, O. Travnikova, D. Iablonsky, P. Decleva, D. Ayuso, R. Püttner, H. Levola, G. Goldsztejn, T. Marchenko, M. N. Piancastelli, M. Simon

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Carbon 1s photoelectron spectra of CO molecules in gas phase were recorded in the tender x-ray energy range, from 2.3 to 6.9 keV. The intensity ratios of individual peaks from ν=0 to 3 within the vibrational progression of the C 1s photoelectron spectrum were determined at the various photon energies and are shown to be strongly affected by the photoelectron recoil effect. The experimental vibrational intensity ratios are compared with theoretical predictions at different levels of accuracy. Developments of the recoil model, using generalized Franck-Condon factors, rovibrational coupling, Morse potential energy curves, and accurate angular averaging are presented and applied to the analysis of the experimental results.

Original languageEnglish
Article number042509
JournalPhysical Review A
Issue number4
Publication statusPublished - 2017 Apr 14

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Kukk, E., Thomas, T. D., Ueda, K., Céolin, D., Granroth, S., Kooser, K., Travnikova, O., Iablonsky, D., Decleva, P., Ayuso, D., Püttner, R., Levola, H., Goldsztejn, G., Marchenko, T., Piancastelli, M. N., & Simon, M. (2017). Photoelectron recoil in CO in the x-ray region up to 7 keV. Physical Review A, 95(4), [042509].