I V Kholin

Quenching of krypton atoms in the metastable 5s ({sup 3}P{sub 2}) state in collisions with krypton and helium atoms

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.

Deactivation of krypton atoms in the metastable 5s({sup 3}P{sub 2}) state in collisions with krypton and argon atoms

The collision deactivation of the metastable 5s[3/2]2o(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.