Measuring the Density of N2 Active Species in N2 –xCH4 Afterglows with x= (0 7.5)10-4 by Mass Spectrometry and Optical Spectroscopy at Low Gas Pressure | Chapter 16 | Plasmas Afterglows with N2 for Surface Treatments synthesis 2024

The density of N-atoms in N₂ pink and late microwave flowing afterglows has been investigated by mass spectrometry and NO titration. By optical spectroscopy, it has been obtained after NO titration the density of N₂(B,11), N₂(C,0) and N₂ +(B,0)) radiative states and of N₂(A), N₂ + metastable and ionic molecules. By introducing a few CH₄ into N₂, the density of C-atoms added to N-atoms is measured in the pink afterglow. The N₂ pink afterglow was observed when the N₂(B,v’=16-18) levels appeared after the autodissociative N₂(B,v’=13-15) states, contrary to the late afterglow where the N₂(B,v’=16-18) levels could not be detected.

 

Author (s) Details

André Ricard
LAPLACE, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, 31062 Toulouse Cedex 9, France.

 

Anne-Marie Diamy
Laboratoire Chimie Surfaces, Univ. Pierre et Marie Curie, 4 Pl.Jussieu, F-75252, France.

 

Jean-Claude Legrand
Laboratoire Chimie Surfaces, Univ. Pierre et Marie Curie, 4 Pl.Jussieu, F-75252, France.

 

Please see the book here:- https://doi.org/10.9734/bpi/mono/978-93-49473-93-5/CH16