Abstract:
We have used the absorption probe method to study the processes of collisional quenching of the metastable 5s [3/2]o2(3P2) state of the krypton atom in electron-beam-excited high-pressure He – Kr mixtures with a low content of krypton. The rate constants of plasma-chemical reactions Kr* + Kr + He → Kr*2+He [(2.88 ± 0.29) × 10-33 cm6 s-1], Kr* + 2He → HeKr* + He [(4.6 ± 1.3) × 10-36 cm6 s-1] and Kr* + He → products + He [(1.51 ± 0.15) × 10-15 cm3 s-1] are measured for the first time. The rate constants of similar reactions in the Ar – Kr mixture are refined.