High-energy non-Franck-Condon vibrational excitation of CH4 by intramolecular photoelectron diffraction

L. Argenti, E. Plésiat, E. Kukk, K. Ueda, P. Decleva, F. Martín

Research output: Contribution to journalConference articlepeer-review


Distinct oscillations in vibrationally resolved cross section ratios for the photoionization of CH4 from the C 1s orbital at photon energies as high as 1keV are predicted. The oscillations are attributed to the different relative vibrational excitation due to the scattering of the photoelectron by the peripheral hydrogen atoms. The latter effect is also responsible for the well known EXAFS oscillations in the integrated photoelectron spectrum. The calculations are performed with an ab-initio DFT method [1], as well as with a single-particle semi-analytical model, which incorporate both the effect of the nuclear recoil and of the Coulomb corrections.

Original languageEnglish
Article number022058
JournalJournal of Physics: Conference Series
Issue numberPART 2
Publication statusPublished - 2012
Event27th International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2011 - Belfast, United Kingdom
Duration: 2011 Jul 272011 Aug 2

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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