کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
168461 457927 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-intrusive detection of combustion intermediates by photoionization via Rydberg states and microwave backscattering
ترجمه فارسی عنوان
تشخیص غیرتهاجمی واسطه های احتراق توسط فوتویونیزاسیون از طریق حالت های ریدبرگ و برگشت به عقب مایکروویو
کلمات کلیدی
طیف سنجی لیزری؛ فوتویونیزاسیون ؛ احتراق؛ رادیکال متیل؛ CH3؛ رادار REMPI
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

A non-intrusive, in-situ detection technique for combustion intermediates in flame environments yields highly resolved spectra that are largely insensitive to molecular vibrations and thus temperature. The technique is based on laser photoionization of target compounds via Rydberg states, followed by detection of the laser-induced plasma with microwave radiation. The feasibility of this approach is tested on methyl radicals that are detected in methane, propane, and hexane fuel-rich flames. The methyl radicals are prepared in the 3s Rydberg state using photoexcitation at 216.4 nm. Using tunable VIS/IR radiation, the molecules are promoted from 3s to the 3pxy and 3pz Rydberg states. Photoionization out of the 3p states with 355 nm photons results in a small-volume plasma that is detected by microwave backscattering. The previously unobserved 3pxy state is found to have a binding energy of 2.57 eV.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 171, September 2016, Pages 162–167
نویسندگان
, , , ,