Quenching of the resonance 5s(3P1) state of krypton atoms in collisions with krypton and helium atoms

The processes of collision quenching of the resonance 5s[3/2]₁^o(³P₁) state of the krypton atom are studied by the absorption probe method in electron-beam-excited high-pressure He – Kr mixtures with a low content of krypton. The rate constants of plasmochemical reactions Kr* + Kr + He → Kr*₂ + He [(4.21 ± 0.42) × 10^-33 cm⁶ s^-1], Kr* + 2He → HeKr* + He [(4.5 ± 1.2) × 10^-36 cm⁶ s^-1] and Kr* + He → products + He [(2.21 ± 0.22) × 10^-15 cm³ s^-1] are measured for the first time. The rate constants of similar reactions are refined for krypton in the metastable 5s[3/2]₂^o (³P₂) state.