Excitation and Emission of Argon behind the Front of Shock Waves at Velocities of 4.5–7.8 km/s: II. The Analysis of Experimental Results

This paper is the continuation of [ https://chemphys.edu.ru/issues/2017-18-1/articles/686/ ]. It presents the analysis of the experimental data [ https://chemphys.edu.ru/issues/2017-18-1/articles/686/ ] on the emission of pure argon behind the front of a strong shock wave in a range of velocities of 4.5–7.8 km/s and a range of pressures ahead of the wave front of 1 Torr. The estimates of the concentration of electrons, at which an avalanche-like increase in the emission intensity starts, are given based on the simplified model of an argon atom. The estimates of the population temperature of the electronic states are made using the data on the change in the concentration of the excited states on an assumption of their Boltzmann distribution. The presented estimates show that the population temperature substantially differs from the temperature of the gas behind the front of a shock wave. The discussion of the initial portion of emission is presented.