Experimental and theoretical investigation of self-broadening and self-shifting of ammonia transition lines in the ν2 band
Abstract
We have measured self-broadenings and self-shiftings of several rotovibrational transitions of the ν2 band of NH3. We have found smaller broadenings and bigger shifts with respect to the known data of the inversion spectrum in the microwave region. The experimental results are compared with the Anderson original line broadening theory, successively extended in order to calculate the shift also. The agreement between experiments and theory is quite good so that it is possible to select the right procedure among those usually adopted in order to avoid divergences occurring in the Anderson's perturbative treatment of the molecular collision matrix.
- Publication:
-
Journal of Chemical Physics
- Pub Date:
- June 1982
- DOI:
- 10.1063/1.442923
- Bibcode:
- 1982JChPh..76.5271B
- Keywords:
-
- Ammonia;
- Frequency Shift;
- Optical Transition;
- Pressure Broadening;
- Radiative Transfer;
- Spectral Line Width;
- Infrared Spectra;
- Line Shape;
- Microwave Spectra;
- Molecular Absorption;
- Molecular Collisions;
- Spectral Bands;
- Spectral Theory;
- Atomic and Molecular Physics