Investigation of the Quenching of N ₂ (B ³ Π _g , v) States by N ₂ and O ₂

This work presents the development of a protocol for the measurement of collisional deexcitation rate constants of N2(B 3Πg ,v) by N2 and O2 in continuation of the work presented at the SciTech 2025 forum [1]. Excited nitrogen is produced using nanosecond repetitively pulsed discharges. The applied voltage and the repetition frequencies are adjusted to minimize rotational and gas heating while keeping high electronic and vibrational excitation levels. The populations of the vibrational levels are measured using optical emission spectroscopy of the first positive system at pressures ranging from 10 to 150 mbar.