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

R. Feifel, T. Tanaka, M. Hoshino, H. Tanaka, Y. Tamenori, V. Carravetta, K. Ueda

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number062717
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume74
Issue number6
DOIs
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint Dive into the research topics of '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'. Together they form a unique fingerprint.

Cite this