Kinetic study of high-pressure Ar–H2O mixtures excited by relativistic electrons

Abstract

Dissociation of the H2O molecule by collisions with metastable argon (3P2) was shown a few years ago to lead to the excitation of the first vibrational levels of A 2Σ+ excited state of OH. The present work consists of a detailed kinetic study of an e-beam excited Ar–H2O mixture to evaluate the potential interest of that reaction scheme for laser applications. In this study, we have mainly shown that OH* (A 2Σ+) is populated by an Ar++H2O pathway too and we give an estimate for the OH* (A 2Σ+) and OH (X 2Π) formation branching ratios. We have also estimated that Ar*2+H2O is a minor OH* pathway. These results and measurements of main reaction rates permitted us to give a kinetic model where the predicted time dependence of population are in good agreement with the experimental result. The feasibility of a radical laser based on the collisional dissociation scheme of molecules is discussed.

Interaction of (3-Aminopropyl)triethoxysilane with Pulsed Ar–O2 Afterglow: Application to Nanoparticles Synthesis

“…Carl et al [33] give for a temperature in the range [296-511] K: [35]. For spontaneous emission, we consider only the v'=0 level with τ OH(A) =800 ns [34].…”

Time-resolved study of amplitude modulation effects in surface-wave atmospheric pressure argon plasma jet

“…The intensities of molecular bands could be used to infer the rotational temperature from the Boltzmann distribution function. Usually, the rotational temperature is an excellent indicator of the gas temperature due to the balance between the rotational and translational degrees of freedom established in plasmas at atmospheric pressure [35,41,42].…”

Rotational temperatures of N2(C,0) and OH(A,0) as gas temperature estimates in the middle pressure Ar/O2 discharge

“…When the rotational relaxation of OH(X,0) is negligible then reaction (6) , [31]). Thus, the lifetime of OH(A,0) is also determined by the radiative decay.…”