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Title: Synchrotron-based double imaging photoelectron/photoion coincidence spectroscopy of radicals produced in a flow tube: OH and OD

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4918634· OSTI ID:1235922
ORCiD logo [1];  [1];  [1];  [1];  [2];  [2];  [2];  [3];  [3];  [4]
  1. Synchrotron SOLEIL, L'Orme des Merisiers, Gif sur Yvette (France)
  2. Univ. de Lille, Villeneuve d'Ascq (France)
  3. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  4. Univ. Bordeaux, Talence Cedex (France)

In this study, we present a microwave discharge flow tube coupled with a double imaging electron/ion coincidence device and vacuum ultraviolet (VUV) synchrotron radiation. The system has been applied to the study of the photoelectron spectroscopy of the well-known radicals OH and OD. The coincidence imaging scheme provides a high selectivity and yields the spectra of the pure radicals, removing the ever-present contributions from excess reactants, background, or secondary products, and therefore obviating the need for a prior knowledge of all possible byproducts. The photoelectron spectra encompassing the X3Σ ground state of the OH+ and OD+ cations have been extracted and the vibrational constants compared satisfactorily to existing literature values. Future advantages of this approach include measurement of high resolution VUV spectroscopy of radicals, their absolute photoionization cross section, and species/isomer identification in chemical reactions as a function of time.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1235922
Alternate ID(s):
OSTI ID: 1228217
Report Number(s):
SAND-2015-3596J; JCPSA6; 583721; TRN: US1600387
Journal Information:
Journal of Chemical Physics, Vol. 142, Issue 16; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 58 works
Citation information provided by
Web of Science

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A vacuum ultraviolet photoionization time-of-flight mass spectrometer with high sensitivity for study of gas-phase radical reaction in a flow tube journal December 2018
Valence shell threshold photoelectron spectroscopy of C 3 H x ( x = 0–3) journal January 2018
Origin band of the first photoionizing transition of hydrogen isocyanide journal January 2019
Photoionization studies of reactive intermediates using synchrotron radiation journal January 2019
Threshold photoelectron spectrum of the CH 2 OO Criegee intermediate journal January 2019
The absolute photoionization cross section of the mercapto radical (SH) from threshold up to 15.0 eV journal January 2019
Photodissociation and photoionisation of atoms and molecules of astrophysical interest journal June 2017
Vacuum upgrade and enhanced performances of the double imaging electron/ion coincidence end-station at the vacuum ultraviolet beamline DESIRS journal December 2015
Vacuum ultraviolet photoionization cross section of the hydroxyl radical journal May 2018
Experimental and theoretical threshold photoelectron spectra of methylene journal December 2018
Quantifying the photoionization cross section of the hydroxyl radical journal April 2019
To see C 2 : Single-photon ionization of the dicarbon molecule journal January 2020
Traceable measurements of He, Ne, Ar, Kr, and Xe photoionization cross sections in the EUV spectral range journal June 2018