کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5416034 | 1393792 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Near infrared emission spectra of CoH and CoD
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
New high resolution emission spectra of CoH and CoD molecules have been recorded in the 640 nm to 3.5 μm region using a Fourier transform spectrometer. The bands were excited in a carbon tube furnace by the reaction of cobalt metal vapor and a mixture of H2 or D2 with He at a temperature of about 2600 °C. Eight bands were observed for the Aâ²3Φ4-X3Φ4 electronic transition of CoD, and five bands for the corresponding transition of CoH. The (0, 0) bands of the Aâ²3Φ3-X3Φ3 system were also recorded for both isotopologues, although one of the parity components in the X3Φ3 sub-state of CoH was found to be perturbed. The Aâ²3Φ3-X3Φ4 transition was also observed in our spectrum of CoH. In addition, a new [13.3]4 electronic state was found by observing [13.3]4-X3Φ3 and [13.3]4-X3Φ4 transitions in the spectrum of CoD. Analysis of the transitions with ÎΩ = 0, ± 1 provided more accurate values of spin-orbit splittings between Ω = 4 and Ω = 3 components. The ground-state data for both molecules were fitted both to band-constant and Dunham-expansion expressions, and a combined-isotopologue analysis of the X3Φ4 spin component was carried out using the data for CoH and CoD. The upper states were represented by term values in these analyses because of perturbations, but estimated band constants for them were obtained in separate fits in which ground-state constants were held fixed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Spectroscopy - Volume 237, Issue 1, May 2006, Pages 11-18
Journal: Journal of Molecular Spectroscopy - Volume 237, Issue 1, May 2006, Pages 11-18
نویسندگان
Iouli E. Gordon, Robert J. Le Roy, Peter F. Bernath,