کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5427352 | 1508635 | 2016 | 7 صفحه PDF | دانلود رایگان |
- A detailed analysis of the weak ν6 band in the 1340-1410 cmâ1 region is made.
- A spectrum recorded at a resolution of 0.003Â cmâ1 and temperature of 200Â K was used.
- The Hamiltonian included two couplings between ν6 and ν9 and one between ν6 and ν8.
- Experimental characterization for states lying below 1400Â cmâ1 is made.
High quality line parameters of the band systems of ethane are required for accurate characterization of spectral features observed in the atmospheres of Jovian planets and their satellites. To date, experimental characterization of the excited vibrational states lying below 1300 cmâ1 has been made. This includes the torsional bands around 35 µm, ν9 (820 cmâ1), ν3 (990 cmâ1), ν12âν9 (380 cmâ1) and ν9+ν4âν4 (830 cmâ1) bands. These earlier high resolution ro-vibrational analyses were made to experimental accuracy. Here, we report a detailed analysis of the weak ν6 band in the 1340-1410 cmâ1 region using a spectrum recorded at a resolution of 0.003 cmâ1 and temperature of 200 K. The Hamiltonian model included couplings between ν6 and ν9 (in particular with ν9+2ν4 with which it is resonantly coupled) as well as couplings between ν6 and ν8. An excellent fit to within experimental accuracy was obtained. Taking the results of this 5-state fit, together with earlier results on lower lying vibrations, we now have experimental characterization for torsion-vibration states of ethane lying below 1400 cmâ1.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 180, September 2016, Pages 7-13