Calculation of rate coefficients for the interaction of singlet and triplet vibrationally excited oxygen

Using the experimental rates of O₂(b¹Σ_g⁺, u = 1 — 3) quenching by oxygen molecules at different temperatures available from the literature, estimates were made of the parameters for analytical formulas which permit calculating the quenching constants for singlet oxygen. The calculated O₂(b¹Σ_g⁺, u = 1 — 15) and O₂(a¹Δ_g, u = 1 — 20) constants of quenching by unexcited oxygen molecules for temperatures T = 300 and 155 K are in good agreement with experimental data. The main channels of O₂(a¹Δ_g, u = 0 — 20) and O₂(b¹Σ_g⁺, u = 0 — 15) quenching by vibrationally excited O₂(X³Σ_g^-, u = 1 — 4) oxygen molecules were investigated.