NUKLEONIKA 2005, 50(Supplement 2):S29-S33
Krzysztof Wojciechowski, Dorota Sugier, Karol Wnorowski, Jan Kowalczyk, Antoni Jówko
Department of Chemistry, University of Podlasie,
54 3 Maja Str., 08-110 Siedlce, Poland
The mechanism and kinetics of O3 formation after an electron pulse have been studied in the Ar-O2
systems by time resolved optical measurements at l = 260 nm. The second
order rate constant of energy transfer from excited Ar(4s,4p) states to O2 molecules:
(1) Ar*,Ar** + O2 ® O2* + Ar,
was found to be (8.9 ± 2.1) ´ 10-10 cm3 s-1.
It was found also the evidence of the third order process contribution to the energy transfer:
(2) Ar*,Ar** + Ar + O2 ® products,
with the rate constant in the range (1.5-3.7) ´ 10-29 cm6 s-1.
The rate constant of the deactivation of excited ozone molecules by O2 was found to be
(5.1 ± 0.6) ´ 10-15 cm3 s-1.