Excitation of N2(B3Pig) in the nitrogen short-lived afterglow

Autor:	D Blois, Andre Chapput, S. De Benedictis, P Goudmand, Giorgio Dilecce, Mohamed Barj, O Dessaux, Philippe Supiot
Rok vydání:	1999
Předmět:	Acoustics and Ultrasonics Chemistry Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion Afterglow symbols.namesake Distribution function Ionization Excited state symbols Atomic physics Ground state Raman scattering Excitation
Zdroj:	Journal of Physics D: Applied Physics. 32:1887-1893
ISSN:	1361-6463 0022-3727
DOI:	10.1088/0022-3727/32/15/317
Popis:	The excitation of the N2(B 3g) state in microwave discharges ignited in flowing nitrogen and in their short-lived afterglow is investigated. Simultaneous measurements in the post-discharge on this species and the N2+(B 2u+) ion through emissions, and also on the electronic ground state of N2 by spontaneous Raman scattering, provide information of their vibrational distribution function. A spatial study has been carried out, showing a quite slow evolution of the vibrational populations along the short-lived afterglow, and in particular the first proof of a steady vibrational distribution of N2(X 1g+) from the beginning to the bulk of this ionized region. The N2(B 3g vibrational distribution is analysed by a steady-state kinetic model taking into account all the B state excitation processes, i.e. electron collisions and reactions between molecular excited states, and quenching. The reaction between the vibrationally excited N2(X 1g+) and N2(A3u+) is shown to be the pre-eminent excitation mechanism in the short-lived afterglow.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5f6775e884a9d0a07cd07a5f1c242785 https://doi.org/10.1088/0022-3727/32/15/317 Zobrazit plný text záznamu