Resonance-enhanced multiphoton ionization detection of vibrationally excited O2

Itai S. Kallos; Kerim Benfreha; Kai Golibrzuch; Hao Zhao; Ilana Bar; Tim Schäfer; Igor Rahinov; Alec M. Wodtke; Joshua H. Baraban

doi:10.1063/5.0251383

Resonance-enhanced multiphoton ionization detection of vibrationally excited O₂

Itai S. Kallos, Kerim Benfreha, Kai Golibrzuch, Hao Zhao, Ilana Bar, Tim Schäfer, Igor Rahinov, Alec M. Wodtke, Joshua H. Baraban

Chemistry

Research output: Contribution to journal › Article › peer-review

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 3d π ( v ′ = 0 ) ← X 3 Σ g − (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.

Original language	English
Article number	051103
Journal	Journal of Chemical Physics
Volume	162
Issue number	5
DOIs	https://doi.org/10.1063/5.0251383
State	Published - 7 Feb 2025

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title = "Resonance-enhanced multiphoton ionization detection of vibrationally excited O2",

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 3d π ( v ′ = 0 ) ← X 3 Σ g − (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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AU - Kallos, Itai S.

AU - Benfreha, Kerim

AU - Golibrzuch, Kai

AU - Zhao, Hao

AU - Bar, Ilana

AU - Schäfer, Tim

AU - Rahinov, Igor

AU - Wodtke, Alec M.

AU - Baraban, Joshua H.

PY - 2025/2/7

Y1 - 2025/2/7

N2 - 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 3d π ( v ′ = 0 ) ← X 3 Σ g − (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.

AB - 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 3d π ( v ′ = 0 ) ← X 3 Σ g − (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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JO - Journal of Chemical Physics

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Resonance-enhanced multiphoton ionization detection of vibrationally excited O₂

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