کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9599206 | 1397454 | 2005 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Direct measurement of the Rayleigh scattering cross section in various gases
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
طیف سنجی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Using the laser-based technique of cavity ring-down spectroscopy extinction measurements have been performed in various gases straightforwardly resulting in cross sections for Rayleigh scattering. For Ar and N2 measurements are performed in the range 470-490Â nm, while for CO2 cross sections are determined in the wider range 470-570Â nm. In addition to these gases also for N2O, CH4, CO, and SF6 the scattering cross section is determined at 532Â nm, a wavelength of importance for lidar applications and combustion laser diagnostics. In O2 the cross section at 532Â nm is found to depend on pressure due to collision-induced light absorption. The obtained cross sections validate the cross sections for Rayleigh scattering as derived from refractive indices and depolarization ratios through Rayleigh's theory at the few %-level, although somewhat larger discrepancies are found for CO, N2O and CH4.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 92, Issue 3, 15 May 2005, Pages 293-310
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 92, Issue 3, 15 May 2005, Pages 293-310
نویسندگان
Maarten Sneep, Wim Ubachs,