کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5416105 | 1393795 | 2006 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
CW-cavity ringdown spectroscopy of carbon dioxide isotopologues near 1.5 μm
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The absorption spectra of carbon dioxide in natural isotopic abundance and with 99% enrichment in 13C have been recorded by CW-cavity ringdown spectroscopy in two specific spectral regions: 5957-6122 and 6745-6833Â cmâ1. The spectra were obtained at Doppler limited resolution by using a CW-CRDS spectrometer based on fibered DFB lasers. The typical sensitivity of 5Â ÃÂ 10â10Â cmâ1, allowed for the detection of lines with intensity as weak as 5Â ÃÂ 10â29 cm/molecule. More than 2900 line positions of the six major isotopologues contributing to the spectra (12C16O2, 16O12C17O, 16O12C18O, 13C16O2, 16O13C17O and 16O13C18O), were measured and assigned on the basis of their respective global effective Hamiltonian models. For comparison, only 507 lines are provided by the HITRAN database in these spectral regions. The band by band analysis has led to the determination of the rovibrational parameters of a total of 52 bands, 30 of them being newly reported. Most of the observed line positions show an agreement close to the experimental uncertainty (1-2Â ÃÂ 10â3Â cmâ1) with the predictions of their respective effective Hamiltonian models. However, the quality of the predictions degrades for the minor isotopologues reaching maximum deviations of 0.35Â cmâ1 in one specific case. For several bands, rovibrational transitions with J values between 60 and 90 could be newly detected. While an excellent agreement is observed with the line positions predicted by the Hamiltonian models, the comparison of these observations with the line positions listed in the HITRAN database or extrapolated by using the best FTS rotational constants available in the literature has evidenced significant deviations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Spectroscopy - Volume 238, Issue 2, August 2006, Pages 241-255
Journal: Journal of Molecular Spectroscopy - Volume 238, Issue 2, August 2006, Pages 241-255
نویسندگان
B.V. Perevalov, S. Kassi, D. Romanini, V.I. Perevalov, S.A. Tashkun, A. Campargue,