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Updated: May 29, 2025

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Resonance-enhanced multiphoton ionization detection of vibrationally excited O2
Itai S Kallos1,2,3, Kerim Benfreha4, Kai Golibrzuch5
1Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
Abstract:
We report a rotationally resolved spectroscopic detection scheme for vibrationally excited molecular oxygen with high sensitivity. Two-color (2 + 1') resonance-enhanced multiphoton ionization (REMPI) spectra of O2 hot bands were recorded for the first time via the 3dπ(v'=0)←X3Σg- (v″ = 1) Rydberg transitions. Spectroscopic constants and relative Franck-Condon factors were extracted and compared to simulations. This new access to quantum-state-resolved diagnostics of vibrationally excited O2 promises to shed light on the physical and chemical dynamics of many processes.
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