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Diode-Laser Measurements of He-Broadening Coefficients in the ν6Band of12CH3F

✍ Scribed by Ivan M. Grigoriev; Jean-Pierre Bouanich; Ghislain Blanquet; Jacques Walrand; Muriel Lepère

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
180 KB
Volume
186
Category
Article
ISSN
0022-2852

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✦ Synopsis

He-broadening coefficients are measured for 28 lines of 12

branches of the n 6 band, using a tunable diode laser spectrometer. The collisional widths obtained by fitting Rautian profiles to the measured shapes of the lines are slightly larger than those derived from Voigt profiles. The broadening coefficients for the lines belonging to the same low J transitions are significantly greater in the R Q 0 branch than in the R Q 6 branch. Moreover, they decrease on the whole with increasing J in the R Q 0 branch and tend to increase from J varying from 7 to 10 in the R Q 6 branch. These trends may be approximately reproduced by calculations based on a semiclassical impact theory of collisional broadening.

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