TY - JOUR
T1 - Quenching and restoring of the A Π2 cationic state in resonant Auger electron spectra of CO in the vicinity of the O 1s→2π resonance
AU - Feifel, R.
AU - Tanaka, T.
AU - Hoshino, M.
AU - Tanaka, H.
AU - Tamenori, Y.
AU - Carravetta, V.
AU - Ueda, K.
PY - 2006
Y1 - 2006
N2 - The evolution of the vibrational intensity distribution of the singly ionized A Π2 state in CO is experimentally examined for photon energy detunings below the adiabatic 0-0 transition of the O 1s→2π resonance. We have found a strong suppression of the entire vibrational fine structure of this state, leading to its almost complete quenching for certain excitation energies, followed by a partial restoring for larger values of negative photon energy detuning. Our observation, that cannot be rationalized by the known model of a vibrational collapse for energy detuning, may be explained in terms of a Fano interference between the direct and resonant photoionization channels in the presence of strong lifetime vibrational interference.
AB - The evolution of the vibrational intensity distribution of the singly ionized A Π2 state in CO is experimentally examined for photon energy detunings below the adiabatic 0-0 transition of the O 1s→2π resonance. We have found a strong suppression of the entire vibrational fine structure of this state, leading to its almost complete quenching for certain excitation energies, followed by a partial restoring for larger values of negative photon energy detuning. Our observation, that cannot be rationalized by the known model of a vibrational collapse for energy detuning, may be explained in terms of a Fano interference between the direct and resonant photoionization channels in the presence of strong lifetime vibrational interference.
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U2 - 10.1103/PhysRevA.74.062717
DO - 10.1103/PhysRevA.74.062717
M3 - Article
AN - SCOPUS:33846368702
VL - 74
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
SN - 1050-2947
IS - 6
M1 - 062717
ER -