Observation of the N2Herman infrared system in pulsed positive streamer induced emission at atmospheric pressure

Autor:	Milan Šimek, M. Clupek, Pavel Sunka, V. Babický
Rok vydání:	2001
Předmět:	Acoustics and Ultrasonics Atmospheric pressure Infrared Chemistry Radical Analytical chemistry chemistry.chemical_element Condensed Matter Physics Nitrogen Surfaces Coatings and Films Electronic Optical and Magnetic Materials Impurity Metastability Maximum density Emission spectrum
Zdroj:	Journal of Physics D: Applied Physics. 34:3185-3190
ISSN:	1361-6463 0022-3727
Popis:	Time-resolved emission spectroscopy has been applied to the study of optical emission induced by pulsed positive primary streamers in coaxial geometry generated in high-purity nitrogen at atmospheric pressure. During the investigation of the post-discharge emission, the formation of N2(B 3Πg, C 3Πu, C'' 5Πu, C' 3Πu) states through N2(A 3Σu+) energy pooling reactions has been discovered. The evolution of the N2(A 3Σu+) metastable species has been inferred through the analysis of the time dependence of the band intensities of the Herman infrared N2(C'' 5Πu→ A' 5Σg+) system. It has been found that, in the case of pulsed positive streamers generated in high-purity nitrogen, the maximum density of the N2(A 3Σu+) metastables occurs during the early post-discharge period (0.5-1 µs). The production of NO(X 2Π) and OH(X 2Π) radicals originating from O2 and H2O impurities has been inferred from the emissions of the NO(A 2Σ+) and OH(A 2Σ+) states. The maximum densities of the NO(X 2Π) and OH(X 2Π) radicals occur in the 9 and 5 µs post-discharge times, respectively.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::95b8ad551888217d595f5ec62351733d https://doi.org/10.1088/0022-3727/34/21/311 Zobrazit plný text záznamu