Electron collision cross section set of O₂ and electron transport coefficients in O₂ and O₂-Ar mixtures

Abstract A complete and consistent set of electron collision cross sections of molecular oxygen (O 2 ) is constructed. The present cross section set consists of the following cross sections: one elastic momentum transfer cross section, 15 rotational excitation cross sections, 15 rotational de-excitation cross sections, one dissociative electron attachment cross section, one three-body attachment cross section, four vibrational excitation cross sections, 11 electronic excitation cross sections, two neutral dissociation cross sections, one cross section for ion-pair formation, and six ionization cross sections. Electron transport coefficients in O 2 and O 2 -Ar mixtures are calculated from the present cross section set and previously reported cross section sets, some of which are available on LXCat. The calculations are performed using the Monte Carlo method. The consistency of the cross section sets is assessed by comparing the calculated electron transport and reaction rate coefficients with measured data over a wide range of reduced electric fields. The branching ratio for the quenching of O( 1 D) by O 2 and that for the Herzberg states of O 2 to neutral dissociation are examined by comparing the calculated and measured excitation coefficients of O 2 (b 1 Σ g + ). In addition, the effect of considering anisotropic electron scattering on the calculated electron transport coefficients is evaluated. The present cross section set of O 2 will be available in MuroranIT database on LXCat.