Div. of Synchrotron Radiation Research


T. Tanaka, H. Shindo, C. Makochekanwa, M. Kitajima,H. Tanaka, A. De Fanis,Y. Tamenori,K. Okada, R. Feifel, S. Sorensen, E. Kukk, and K. Ueda
Interference Effects in Auger Resonant Raman Spectra of CO via Selective Vibrational Excitations Across the O 1s -2? Resonance
Phys. Rev. A 72, 022507 (2005).

The Auger resonant Raman spectra of CO, arising from the transitions to the X and A final electronic states of CO+, have been recorded at photon energies corresponding to the vibrational excitations v=3,5, and 8 in the O 1s2 resonance. The spectra are simulated within the model that takes into account both the lifetime-vibrational interference (LVI) and interference with the nonresonant photoemission. The spectroscopic parameters, e, exe, and re, of the O 1s–12 core-excited state, necessary for the simulation, have been derived by fitting the Franck-Condon simulation to the total ion yield spectrum, assuming a Morse potential for the O 1s–pi state. Not only the LVI but also the interference with the nonresonant photoemission turn out to be significant.

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