کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5429802 | 1397371 | 2010 | 17 صفحه PDF | دانلود رایگان |

An effective Hamiltonian built up to sixth order in the Amat-Nielsen ordering scheme describing all rovibrational energy levels in the ground electronic state and containing in explicit form all resonance interaction terms due to the approximate relations between harmonic frequencies Ï1â2Ï2 and Ï3â4Ï2 was applied to model the observed rovibrational line positions (collected from the literature) of 14N15N16O and 15N14N16O isotopologues of nitrous oxide. For 14N15N16O, 124 effective Hamiltonian parameters were fitted to near 28Â 000 observed line positions covering the 0.8-8860Â cmâ1 spectral range. The RMS of the weighted fit is 0.00126Â cmâ1 and dimensionless standard deviation is 1.48. For 15N14N16O, 121 effective Hamiltonian parameters were fitted to more than 31Â 000 observed line positions covering the same spectral interval. The RMS of the weighted fit is 0.00185Â cmâ1 and dimensionless standard deviation is 1.85. In both cases the models describe all available line positions with precision compatible to the measurement uncertainties. A number of local resonance perturbations was found and discussed. Among these perturbations there are interpolyad resonance Coriolis interactions. A comparison of HITRAN-2008 data with the calculations based on the fitted models is presented.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 111, Issue 9, June 2010, Pages 1089-1105