André Ricard, Anne-Marie Diamy and Jean-Claude Legrand. Measuring the Density of N\(_2\) Active Species in N\(_2\) –xCH\(_4\) Afterglows with x= (0-7.5)10\(^{-4}\) by Mass Spectrometry and Optical Spectroscopy at Low Gas Pressure. PANST [Internet]. 2025 Mar. 26 [cited 2026 Jul. 4];:352-64. Available from: https://stm.bookpi.org/PANST/article/view/17716