High resolution Fourier transform infrared spectroscopy using a high temperature argon arc source
Abstract
Application of a high temperature wall-stabilized argon arc source (HTAAS) for high resolution near- and mid-infrared Fourier transform infrared spectroscopy (FTIR) has been investigated. Spectra of N 2O, NH 3 and the complex OC-HCl were recorded at maximum apodized instrumental resolution (0.004 cm -1). The signal to noise ( S/ N) ratio of these molecular absorption transitions were compared with corresponding spectra recorded using a 1520(30) K globar source. At 7.6 μm, recorded 14N2 16O transitions are consistent with a HTAAS at approximately 10,000 K and an enhancement of 12.6 in recorded S/ N ratios with respect to the latter globar source. Such results demonstrate a significantly enhanced performance for specific FTIR applications such as high resolution static gas phase spectroscopy and molecular spectroscopy in supersonic jet expansions, and potentially for infrared microscopy.
- Publication:
-
Infrared Physics and Technology
- Pub Date:
- December 2001
- DOI:
- 10.1016/S1350-4495(01)00113-X
- Bibcode:
- 2001InPhT..42..509M