Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5428641 | Journal of Quantitative Spectroscopy and Radiative Transfer | 2013 | 7 Pages |
â¢Many methyl fluoride absorption lines have been observed at 845-865 nm.â¢Laser diodes sources and the frequency modulation technique permit fine spectroscopy.â¢Absorption cross sections as low as 1Ã10â26 cm2/molecule have been detected.â¢Pressure broadening and shift coefficients have collected for the more intense lines.
One hundred fifty-six 12CH3F overtone absorption lines, comprised between 11Â 545 and 11Â 836Â cmâ1, have been observed by using a tunable diode laser (TDL) spectrometer. Their intensities range around 10â26Â cm/molecule and have been measured by utilizing commercial AlGaAs/GaAs laser diodes through the wavelength modulation (WM) and the 2nd harmonic (2f) detection techniques. Self-broadening coefficients and line strengths have been measured at room temperature for seven of the strongest transitions, while air-broadening coefficients have been obtained for two lines. In addition, self- and air-collisional shifts have been measured for the 11Â 564.25Â cmâ1 transition.