Detection of fluorescence from O and N atoms induced by two-photon absorption
| Autor: | B. E. Perry, William K. Bischel, David R. Crosley |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Materials Science (miscellaneous) Two-photon absorption Industrial and Manufacturing Engineering Fluorescence spectroscopy symbols.namesake Excited state symbols Emission spectrum Business and International Management Atomic physics Absorption (electromagnetic radiation) Laser-induced fluorescence Spectroscopy Raman scattering |
| Zdroj: | Applied optics. 21(8) |
| ISSN: | 1559-128X |
| Popis: | The 3p (3)P state of O and the 2s(2)2p(2)3p (4)D(0) states of N are populated by two-photon absorption at 226 and 211 nm, respectively, and the resulting near-IR fluorescence is detected. The exciting photons are provided by stimulated Raman frequency shifting, and the experiments are performed in a flow discharge. The measured lifetime of 39 (0) and 27 (N) nsec and quenching rate constants of 2.5 x 10(-10) cm(-3) sec(-1) for collisions of N(2) with each atom indicate promise for this method as a diagnostic tool in flames and plasmas. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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