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dc.creatorStancu, G. D.en_US
dc.creatorRopcke, J.en_US
dc.creatorDavies, P. B.en_US
dc.date.accessioned2006-06-15T20:59:03Z
dc.date.available2006-06-15T20:59:03Z
dc.date.issued2004en_US
dc.identifier2004-WJ-02en_US
dc.identifier.urihttp://hdl.handle.net/1811/21531
dc.description$^{a}$C. Yamada and E. Hirota, J.Chem. Phys. 78, (2) 669 (1983).en_US
dc.descriptionAuthor Institution: INP-Greifswald; Department of Chemistry, University of Cambridgeen_US
dc.description.abstractThe determination of methyl radical concentrations in terrestrial and astronomical sources using infrared spectroscopy relies on the availability of accurate line strengths and transition dipole moments. The $\nu_{2}$ fundamental of $CH_{3}$ near $606 cm^{-1}$ is particularly useful for this purpose but the current value of its transition dipole moment is uncertain by at least $20%$. We have measured the line strength of 9 Q-branch lines of the $2^{1}_{0}$ band of $CH_{3}$ from Q(1,1) to Q(12,12) using diode laser absorption spectroscopy. The method is based on following the recombination rate of methyl radicals in a pulsed discharge in tertiary butyl peroxide heavily diluted in $argon^{a}$. The translational, rotational and vibrational temperatures of the radical were precisely determined from line widths and relative line intensities in both the $\nu_{2}$ fundamental and hot bands. The new value of the transition dipole moment is $0.22 \pm 0.02$ D which is compatible with most previous measurements and calculations, and with the transition dipole moment of the $\nu_{3}$ band.en_US
dc.format.extent313314 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleTRANSITION DIPOLE MOMENT AND LINE STRENGTHS FOR THE $\nu_{2}$ FUNDAMENTAL BAND OF THE METHYL RADICALen_US
dc.typearticleen_US


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