کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5429587 | 1397361 | 2011 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Collisional line widths of autoperturbed N2: Measurements and quantum calculations Collisional line widths of autoperturbed N2: Measurements and quantum calculations](/preview/png/5429587.png)
In this work we present new experimental and theoretical values for the line broadening coefficients of the Q-branch Raman lines of autoperturbed N2. For the experimental determination of the coefficients, high resolution stimulated Raman spectra of the Q-branch of N2 at different pressures were obtained at 77, 194 and 298Â K. Simultaneously, quantum dynamical calculations, performed on two potential energy surfaces, were carried out for the system between 77 and 298Â K, rendering a set of theoretical line broadening coefficients that could be directly compared to those obtained from the present measurements and the previous ones. Within the limit of considering the colliding molecules distinguishable we discuss the ortho and para contributions to the pressure broadening cross-sections. Because such calculations are time consuming we indicate routes to circumvent this difficulty. We observe a reasonable agreement between theoretical and experimental values of the collisional line broadening coefficients at all the studied temperatures.
⺠Pressure broadening coefficients N2-N2. ⺠HWHM of isotropic Raman Q lines at low temperatures. ⺠Temperature dependence of the HWHM. ⺠Close-coupling calculations. ⺠Test of two PESs.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 112, Issue 16, November 2011, Pages 2542-2551