Laser photofragmention-laser induced fluorescence detection of the hydroperoxyl radical: Photofragment energy distributions, detection sensitivity and kinetics

Anthony J Hynes, R. C. Richter, C. J. Nien

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A laser photofragment-laser induced fluorescence technique has been developed for the detection of the hydroperoxyl radical, HO2. The OH photofragment rotational distribution peaks at low temperature with a preference for population of the lower energy, 2Π3/2, spin orbit component. Greater than 75% of the O atoms are produced in the O1D state. An HO2 detection sensitivity of 2 × 1011 cm-3 was achieved in 300 Torr of N2, indicating that this approach has the sensitivity and temporal resolution to be useful for kinetic studies of HO2 under realistic atmospheric conditions.

Original languageEnglish (US)
Pages (from-to)633-638
Number of pages6
JournalChemical Physics Letters
Volume258
Issue number5-6
StatePublished - Aug 23 1996

Fingerprint

laser induced fluorescence
energy distribution
Fluorescence
Kinetics
Lasers
kinetics
meteorology
temporal resolution
lasers
Orbits
orbits
Atoms
sensitivity
atoms
Temperature
energy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

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abstract = "A laser photofragment-laser induced fluorescence technique has been developed for the detection of the hydroperoxyl radical, HO2. The OH photofragment rotational distribution peaks at low temperature with a preference for population of the lower energy, 2Π3/2, spin orbit component. Greater than 75{\%} of the O atoms are produced in the O1D state. An HO2 detection sensitivity of 2 × 1011 cm-3 was achieved in 300 Torr of N2, indicating that this approach has the sensitivity and temporal resolution to be useful for kinetic studies of HO2 under realistic atmospheric conditions.",
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AU - Richter, R. C.

AU - Nien, C. J.

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AB - A laser photofragment-laser induced fluorescence technique has been developed for the detection of the hydroperoxyl radical, HO2. The OH photofragment rotational distribution peaks at low temperature with a preference for population of the lower energy, 2Π3/2, spin orbit component. Greater than 75% of the O atoms are produced in the O1D state. An HO2 detection sensitivity of 2 × 1011 cm-3 was achieved in 300 Torr of N2, indicating that this approach has the sensitivity and temporal resolution to be useful for kinetic studies of HO2 under realistic atmospheric conditions.

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