The cavity-enhanced absorption spectrum of NH3 in the near-infrared region between 6850 and 7000 cm-1

  • D. M. O'Leary
  • , J. Orphal
  • , A. A. Ruth
  • , U. Heitmann
  • , P. Chelin
  • , C. E. Fellows

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we describe new high-resolution measurements of the absorption spectrum of 14NH3 in the 6850-7000 cm-1 region using cavity-enhanced absorption spectroscopy (CEAS), and Fourier-transform spectroscopy (FTS) between ∼6400 and 6900 cm-1. The CEAS measurements were used to determine line positions, line intensities (cross-sections) and pressure-broadening parameters, the latter in three different bath gases. A total of 1117 NH3 lines were observed. The accuracy of the line positions is about 0.001 cm-1, and absorptions cross-sections as low as 1×10-23 cm2 molecule-1 are reported.

Original languageEnglish
Pages (from-to)1004-1015
Number of pages12
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume109
Issue number6
DOIs
Publication statusPublished - Apr 2008

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