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The N 2 pressure broadening coefficient of the J = 1 ← 0 transition of ¹H 35 Cl measured by tunable far infrared (TuFIR) spectroscopy
Author(s) -
Bryant C. H.,
Davies P. B.,
Sears T. J.
Publication year - 1996
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/96gl01766
Subject(s) - torr , sideband , analytical chemistry (journal) , spectroscopy , infrared , voigt profile , atomic physics , infrared spectroscopy , materials science , spectrometer , nuclear magnetic resonance , physics , chemistry , optics , spectral line , microwave , chromatography , quantum mechanics , astronomy , thermodynamics
A tunable far infrared (TuFIR) laser sideband spectrometer has been used to determine the N 2 pressure broadening coefficient of the lowest rotational transition of ¹H 35 Cl between 0 and 1.8 Torr at room temperature (298 K). The parameters defining a Voigt lineshape were fitted to the J = 1 ← 0 transition using a Levenberg‐Marquardt non‐linear least squares fitting routine. The average N 2 broadening coefficient of the three components was determined to be 4.10(10)/(MHz/Torr), 0.104(2)/(cm −1 /atm).