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 dc.creator Auwera, J. Vander en_US dc.creator Kleffmann, J. en_US dc.creator Flaud, J.- M. en_US dc.creator Pawelke, G. en_US dc.creator Bürger, H. en_US dc.date.accessioned 2006-06-15T20:05:38Z dc.date.available 2006-06-15T20:05:38Z dc.date.issued 2000 en_US dc.identifier 2000-WG-06 en_US dc.identifier.uri http://hdl.handle.net/1811/19956 dc.description Author Institution: Laboratoire de Chimie Physique Mol\'eculaire C.P.; Physikalische Chemie, FB 9, Universit\""at-GH Wuppertal; Laboratoire de Photophysique Mol\'eculaire, CNRS, Universit\'e de Paris-Sud, Campus d' Orsay, B\^{a}t; Anorganische Chemie, FB 9. Universit\""at-GH Wuppertal en_US dc.description.abstract We have measured absolute line intensities in the $\nu_{2}$ fundamental band at $1238 cm^{-1}$ of both isotopomers of hypochlorous acid. To obtain the partial pressure of the species in the sample mixture, unavailable through direct measurement since HOCl exists only in equilibrium with $H_{2}O$ and $Cl_{2}O$ and may decay by secondary reactions, we relied on known line intensities in the pure rotational far infrared (FIR) spectrum determined from Stark effect measurements. We have thus recorded simultaneously the FIR pur rotation spectrum of HOCl using a Bruker IFS120HR interferometer and the spectrum of a few vibration-rotation lines in the infrared (IR)$\nu_{2}$ band using a tunable diode laser spectrometer. The absolute intensities of the IR lines thus determined allowed to calibrate'' the intensites of vibration-rotation lines in the whole band, measured previously using Fourier transform spectroscopy. The treatment of the data took into account the blackbody emission contribution in the FIR and the evolution of the HOCl amount during the recording of the spectra. The square of the transition dipole moment and a linear Herman-Wallis factor were determined for both isotopomers. The line intensities were also least squares fitted using a full model that calculates explicity the transition moment matrix elements. This allowed us to account for a weak resonance between the (010) and (002) levels, which leads to the observation of a few $2 \nu_{3}$ resonating lines. The experimental work, results and comparison with previous measurements will be presented. en_US dc.format.extent 164903 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title ABSOLUTE LINE INTENSITIES MEASUREMENTS IN THE $\nu_{2}$ BAND OF HOCl en_US dc.type article en_US
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