کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5416233 | 1393807 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Collisional line shifting and broadening in the fundamental P-branch of CO in Ar between 214 and 324Â K
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Collisional line shifting and broadening in the fundamental P-branch of CO in Ar between 214 and 324Â K Collisional line shifting and broadening in the fundamental P-branch of CO in Ar between 214 and 324Â K](/preview/png/5416233.png)
چکیده انگلیسی
The collisional shifts and widths of several P-branch spectral lines in the fundamental band of CO-Ar have been measured at temperatures between 214 and 324Â K and pressures between 0.025 and 1Â atm. The widths have been determined using a line shape model based on the solution of the transport/relaxation equation for the appropriate off-diagonal element of the density matrix. The model uses a realistic molecular potential energy surface to calculate the speed dependence of the collisional broadening, and a rigid sphere potential to calculate the translational motion. It is found that both the shifting and broadening coefficients follow a power law dependence on the temperature. Additionally, it is demonstrated that studies have tended to overestimate the accuracy of collisional widths when the line shape model used to obtain the widths involves multiple fitted line shape parameters or fails to fit the measured spectra within the experimental noise.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Spectroscopy - Volume 235, Issue 1, January 2006, Pages 69-76
Journal: Journal of Molecular Spectroscopy - Volume 235, Issue 1, January 2006, Pages 69-76
نویسندگان
R. Wehr, A. Vitcu, F. Thibault, J.R. Drummond, A.D. May,