https://doi.org/10.1140/epjd/e2002-00240-x
Collisional broadening and shifting of ammonia absorption lines at 790 nm
Istituto per i Processi Chimico-Fisici del Consiglio
Nazionale delle Ricerche, Area della Ricerca di Pisa, Via G. Moruzzi 1,
56124 Pisa, Italy
Corresponding author: a alex@ifam.pi.cnr.it
Received:
13
February
2002
Revised:
18
September
2002
Published online:
17
December
2002
By using a diode laser spectrometer based on a commercial heterostructure diode laser operating in free-running mode, line shape parameters of some ammonia ro-vibrational overtones at 790 nm have been measured at room temperature. These weak absorption lines have been detected by using the wavelength modulation spectroscopy technique with second-harmonic detection. The broadening and shifting coefficients have been obtained for ten absorption lines by fitting the collected second-harmonic absorption features and varying the pressure of different buffer gases.
PACS: 33.70.Jg – Line and band widths, shapes, and shifts / 33.20.Ea – Infrared spectra / 07.57.Ty – Infrared spectrometers, auxiliary equipment, and techniques
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
