1+1' resonant multiphoton ionisation of OH radicals via the A2Σ+ state: insights from direct comparison with A-X laser-induced fluorescence detection

Beames, Joseph M.; Liu, Fang; Lester, Marsha I.

doi:10.1080/00268976.2013.822592

1+1' resonant multiphoton ionisation of OH radicals via the A²Σ⁺ state: insights from direct comparison with A-X laser-induced fluorescence detection

Journal Article · Wed Sep 18 00:00:00 EDT 2013 · Molecular Physics

DOI:https://doi.org/10.1080/00268976.2013.822592· OSTI ID:1598547

Beames, Joseph M. ^[1]; Liu, Fang ^[2]; Lester, Marsha I. ^[2]

Univ. of Pennsylvania, Philadelphia, PA (United States); University of Pennsylvania
Univ. of Pennsylvania, Philadelphia, PA (United States)

Here, a 1+1' resonance-enhanced multiphoton ionisation (REMPI) scheme for OH X²Π radicals is characterised for a broad range of intermediate A²Σ⁺ (v = 1, J, F_i) levels. The intensities of OH A-X (1,0) transitions detected by subsequent fixed-frequency VUV ionisation are compared among those obtained by near simultaneous laser-induced fluorescence (LIF) measurements. The ratios of the 1+1' REMPI to LIF signals are used to derive enhancement factors which reflect the VUV absorption to the OH A³Π, 3d, v = 0 Rydberg state and/or the fast autoionisation process that yields OH⁺ ions. The determination of the enhancement factors permits 1+1' REMPI to be utilised as a quantitative state-specific probe of OH X²Π radicals.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Pennsylvania, Philadelphia, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: FG02-87ER13792

OSTI ID:: 1598547

Journal Information:: Molecular Physics, Journal Name: Molecular Physics Journal Issue: 7 Vol. 112; ISSN 0026-8976

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (3)

Unimolecular dissociation dynamics of vibrationally activated CH3CHOO Criegee intermediates to OH radical products Kidwell, Nathanael M.; Li, Hongwei; Wang, Xiaohong Nature Chemistry, Vol. 8, Issue 5 https://doi.org/10.1038/nchem.2488	journal	April 2016
Synchrotron-based double imaging photoelectron/photoion coincidence spectroscopy of radicals produced in a flow tube: OH and OD Garcia, Gustavo A.; Tang, Xiaofeng; Gil, Jean-François The Journal of Chemical Physics, Vol. 142, Issue 16 https://doi.org/10.1063/1.4918634	journal	April 2015
Measurements of trap dynamics of cold OH molecules using resonance-enhanced multiphoton ionization Gray, John M.; Bossert, Jason A.; Shyur, Yomay Physical Review A, Vol. 96, Issue 2 https://doi.org/10.1103/physreva.96.023416	journal	August 2017

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74 ATOMIC AND MOLECULAR PHYSICS
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laser-induced fluorescence

1+1′ resonant multiphoton ionisation of OH radicals via the A²Σ⁺ state: insights from direct comparison with A-X laser-induced fluorescence detection Beames, Joseph M.; Liu, Fang; Lester, Marsha I. https://doi.org/10.6084/m9.figshare.977907 The current record is supplemented by this text	text	January 2014
1+1′ resonant multiphoton ionisation of OH radicals via the A²Σ⁺ state: insights from direct comparison with A-X laser-induced fluorescence detection Beames, Joseph M.; Liu, Fang; Lester, Marsha I. https://doi.org/10.6084/m9.figshare.977907.v1 The current record is supplemented by this text	text	January 2014
1+1′ resonant multiphoton ionisation of OH radicals via the A²Σ⁺ state: insights from direct comparison with A-X laser-induced fluorescence detection Beames, Joseph M.; Liu, Fang; Lester, Marsha I. https://doi.org/10.6084/m9.figshare.977907.v2 The current record is supplemented by this text	text	January 2014