Deactivation of krypton atoms in the metastable 5s(3P2) state in collisions with krypton and argon atoms

The collision deactivation of the metastable 5s[3/2]₂^o(³P₂) state of krypton atoms is studied by the absorption probe method in electron-beam-excited high-pressure Ar—Kr mixtures with a low krypton content. The rate constants of plasma-chemical reactions Kr* + Kr + Ar → Kr₂* + Ar [(4.1±0.4)×10^-33 cm⁶ s^-1] and Kr* + 2Ar → ArKr* + Ar (less than 10^-35 cm⁶ s^-1) are measured for the first time and the rate constant of the reaction Kr* + Ar → products + Ar [(3.8±0.4)×10^-15 cm³ s^-1] is refined.