Violation of the Franck-Condon principle due to recoil effects in high energy molecular core-level photoionization

E. Kukk, K. Ueda, U. Hergenhahn, X. J. Liu, G. Prümper, H. Yoshida, Y. Tamenori, C. Makochekanwa, T. Tanaka, M. Kitajima, H. Tanaka

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110 Citations (Scopus)

Abstract

Carbon 1s photoelectron spectra of methane are measured over a photon energy range between 480 eV and 1200 eV. Additional components appear between the individual symmetric stretching vibrational components and are attributed to the excitations of asymmetric stretching and bending vibrations due to recoil of the high-energy photoelectron emission. This recoil effect is the evidence for the violation of the Franck-Condon principle which states that neither the positions nor the momenta of the nuclei change during the ionization event.

Original languageEnglish
Article number133001
JournalPhysical review letters
Volume95
Issue number13
DOIs
Publication statusPublished - 2005 Sep 23

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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