Interference effects in Auger resonant Raman spectra of CO via selective vibrational excitations across the O 1s-->2pi resonance

Tanaka T.

Shindo H.

Mackochekanwa C.

Kitajima M.

Tanaka H.

De Fanis A.

Tamenori Y.

Okada Kazumasa

Feifel R.

Sorensen S.

Kukk E.

Ueda K.

Physical Review A

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[prime]=3,5, and 8 in the O 1s-->2pi 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, omegae, omegaexe, Gamma and re, of the O 1s–12pi 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–12pi state. Not only the LVI but also the interference with the nonresonant photoemission turn out to be significant.

Physics [ 420 ]

eng

American Physical Society

Copyright (c) The American Physical Society

[ISSN] 1050-2947

[DOI] http://dx.doi.org/10.1103/PhysRevA.72.022507 isVersionOf