New wavenumber calibration tables from heterodyne frequency measurements
Abstract
A calibration atlas is set forth that uses frequency calibrations to establish the absolute references for wavenumbers with references to alternate complementary methodologies. Heterodyne frequency-measurement techniques are described with attention given to the corresponding analytical techniques for treating the Hamiltonians and least-squares fits. Intensities and lineshape parameters are reviewed for calibration purposes along with information regarding data sources and typical errors. OCS and N2O are the key molecules for calibrations and are supported by molecules including NO, CO, and CS2. The calibration molecules cover the IR spectrum from about 488-4400/cm, and the calibration atlas is useful for wavenumber determinations by means of heterodyne frequency measurements and other frequency-based techniques.
- Publication:
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National Institute of Standards and Technology Journal of Research
- Pub Date:
- August 1992
- Bibcode:
- 1992NISTJ..97..409M
- Keywords:
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- Calibrating;
- Frequency Measurement;
- Infrared Instruments;
- Laser Applications;
- Optical Heterodyning;
- Carbon Dioxide Lasers;
- Carbon Monoxide Lasers;
- Data Bases;
- Fourier Transformation;
- Nitrogen Oxides;
- Tables (Data);
- Instrumentation and Photography