کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9605428 | 44139 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Absorption cross-section of IO at 427.2Â nm and 298Â K
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Absorption cross-section of IO at 427.2Â nm and 298Â K Absorption cross-section of IO at 427.2Â nm and 298Â K](/preview/png/9605428.png)
چکیده انگلیسی
The absorption cross-section of the IO radical was determined at a wavelength of 427.2 nm and at a resolution of â0.08 nm at room temperature (298 ± 2 K) using the technique of laser photolysis combined with transient absorption spectroscopy. Three previously untested chemical schemes were used to generate calibrated amounts of IO and two of these were used to derive a cross-section of Ï427.2nmIO=(3.55±0.35)Ã10â7cm2moleculeâ1. The value of Ïmax, at the peak of the 4,0 band (located at â427.08 nm, wavelengths given in air) is â8% larger than at 427.2 nm. This result is compared with previous determinations and evaluations. As part of this study the branching ratio (at 298 K) of IO formation from the reactions of O(3P) with CF3I and CH3I were measured as 0.90 ± 0.05 and 0.38 ± 0.05, respectively. Data on the formation and relaxation of vibrationally excited IO in the chemical systems used in this study were also obtained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 176, Issues 1â3, 14 December 2005, Pages 3-14
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 176, Issues 1â3, 14 December 2005, Pages 3-14
نویسندگان
T.J. Dillon, M.E. Tucceri, D. Hölscher, J.N. Crowley,