The rotational spectrum of propynal in the 250-700 GHz range using coherent synchrotron radiation Fourier transform spectrometry

Joanna Barros, Dominic R T Appadoo, Donald McNaughton, Evan Garry Robertson, Christopher Michael Medcraft, Ruth Plathe, Pascale Roy, Laurent Manceron

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The coherent synchrotron radiation obtained at SOLEIL has allowed, for the first time, measurement of broad band absorption, Fourier transform spectra in the sub-THz range at 0.001 cm−1 resolution, with a signal-to-noise ratio of 100 attained in a few hours. The technique has been applied to the observation of the pure rotational spectrum of propynal (HCtriple bond; length of mdashCCHO) in the 250–700 GHz range. The new data have allowed the determination of more precise values for rotational constants and for higher order rotational constants. The potential of the technique for rapid recording of rotational spectra in this energy range is outlined.
Original languageEnglish
Pages (from-to)44-48
Number of pages5
JournalJournal of Molecular Spectroscopy
Publication statusPublished - 2015


  • Propynal
  • Sub-THz
  • Rotational spectrum
  • Coherent synchrotron radiation

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