Simultaneous, time-resolved measurements of OH and HO2 radicals by coupling of high repetition rate LIF and cw-CRDS techniques to a laser photolysis reactor and its application to the photolysis of H2O2

A new experimental set-up for the simultaneous, time-resolved measurement of OH and HO 2 radicals by coupling high repetition rate Laser Induced Fluorescence (LIF) and cw-Cavity Ring-Down Spectroscopy (cw-CRDS) detection techniques to a laser photolysis reactor has been installed. The first experime...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Vol. 103; no. 3; pp. 725 - 733
Main Authors: Parker, A. E., Jain, C., Schoemaecker, C., Szriftgiser, P., Votava, O., Fittschen, C.
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer-Verlag 01.06.2011
Subjects:
Absorption cross sections
Engineering
Joining
Lasers
Optical Devices
Optics
Photolysis
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Radicals
Reactors
Repetition
Spectroscopy
Photodiode Signal
Photolysis Laser
High Repetition Rate
Photolysis
Absorption Cross Section
ISSN:0946-2171, 1432-0649
Online Access:Get full text
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Summary:A new experimental set-up for the simultaneous, time-resolved measurement of OH and HO 2 radicals by coupling high repetition rate Laser Induced Fluorescence (LIF) and cw-Cavity Ring-Down Spectroscopy (cw-CRDS) detection techniques to a laser photolysis reactor has been installed. The first experiments concern the well-known photolysis of H 2 O 2 : the absorption cross sections of H 2 O 2 lines in the near-infrared at 6636.75 and 6639.90 cm −1 have been determined by combined results of spectroscopic and kinetic measurements of OH and HO 2 radicals produced by the photolysis of H 2 O 2 at 248 nm. These experiments will enable the measurement of absolute H 2 O 2 concentrations in future experiments with the same set-up.
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ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-010-4225-1