Three-photon-excited fluorescence detection of atomic hydrogen in an atmospheric-pressure flame.
نویسندگان
چکیده
By using three-photon excitation at 291.7 nm of the n = 4 hydrogen level and observing Balmer-beta radiation at 486.1 nm, hydrogen atoms in an atmospheric C(2)H(2)/O(2) flame have been detected. Other schemes for hydrogen detection were also tried, and the results are discussed.
منابع مشابه
Nitrogen Atom Detection in Low-Pressure Flames by Two-Photon Laser-Excited Fluorescence
Nitrogen atoms have been detected in stoichiometric flat premixed H2/O2/N2 flames at 33 and 96 mbar doped with small amounts of NH3, HCN, and (CN)2 using two-photon laser excitation at 211 nm and fluorescence detection around 870nm. The shape of the fluorescence intensity profiles versus height above the burner surface is markedly different for the different additives. Using measured quenching ...
متن کاملHigh-Repetition-Rate Imaging of Atomic Oxygen In Flames
Two-photon laser-induced fluorescence (TPLIF) is a well-recognized approach for detecting atomic oxygen however, measurements to date have been restricted to a single point within a flow, flame, or plasma, due to the inherently high intensity requirements for the excitation laser. Furthermore, the high-intensity ultraviolet (UV) photons used for two-photon excitation process can photochemically...
متن کاملNew diagnostic methods for laser plasma- and microwave-enhanced combustion.
The study of pulsed laser- and microwave-induced plasma interactions with atmospheric and higher pressure combusting gases requires rapid diagnostic methods that are capable of determining the mechanisms by which these interactions are taking place. New rapid diagnostics are presented here extending the capabilities of Rayleigh and Thomson scattering and resonance-enhanced multi-photon ionizati...
متن کاملSpatially resolved temperature measurements in a flame using laser-excited two-line atomic fluorescence and diode-array detection.
Spatially resolved temperature measurements in a CH(4)-air flame have been achieved using two-line laser-induced fluorescence from indium atoms seeded to the flame.
متن کاملH and 0 Atom Detection for Combustion Applications: Study of Quenching and Laser Photolysis Effects
A method is in development which should allow the determination of absolute number densities of H and 0 atoms in flames from two-photon laser-excited fluorescence measurements. The calibration will be based on reference experiments in a discharge-flow reactor. In this study, the influence of fluorescence quenching and the generation of additional H and 0 atoms by laser photolysis of the flame g...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Optics letters
دوره 9 6 شماره
صفحات -
تاریخ انتشار 1984