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Determination of N and O – Atom and N 2 (A) Metastable Molecule Densities in the Afterglows of N 2 and N 2 ‐O 2 Microwave Discharges
Author(s) -
Zerrouki H.,
Ricard A.,
Sarrette J. P.
Publication year - 2013
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201300008
Subject(s) - afterglow , metastability , molecule , impurity , spectroscopy , atom (system on chip) , atomic physics , analytical chemistry (journal) , materials science , physics , chemistry , gamma ray burst , chromatography , quantum mechanics , astronomy , computer science , embedded system
Early afterglows of N 2 and N 2 ‐O 2 flowing microwave discharges are characterized by optical emission spectroscopy. The N and O atom and N 2 (A) metastable molecule densities are determined by optical emission spectroscopy after calibration by NO titration for N‐atoms and measurements of NO and N 2 band intensities for O‐atoms and N 2 (A) metastable molecules. By using N 2 tanks with 50 and 10 ppm impurity, it is determined in the afterglow an O‐ atom impurity of 150‐200 ppm. Variations of the N and O‐atom and N 2 (A) metastable molecule densities are obtained in the early afterglow of N 2 –(9·10 –5 –3·10 –3 )O 2 gas mixtures. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)