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- Title
Monte Carlo simulation of the radiolysis of the ceric sulfate dosimeter by low linear energy transfer radiation.
- Abstract
The ceric sulfate dosimeter is based on the radio-induced reduction of Ce4+ in acidic medium. For low linear energy transfer (LET) radiation, the yield of Ce3+ is 2.4 molecules / 100 eV, regardless of the presence of oxygen. To investigate the reaction mechanisms of the ceric sulfate dosimeter, we simulated the chemical reaction kinetics curves and the evolution of G(Ce3+), G(O2), and G(H2) in the ceric sulfate solution with and without oxygen. Studies of G(Ce3+) as function of the initial concentration of Ce3+ and of the LET were also done. One important finding of this study is that •OH radicals are scavenged by the reaction •OH + HSO4- → SO4•- + H2O, rather than by the reaction •OH + Ce3+ → Ce4+ + OH-.
- Subjects
MONTE Carlo method; RADIATION chemistry; SULFATES; DOSIMETERS; LINEAR energy transfer; SOLUTION (Chemistry); CHEMICAL kinetics; CERIUM
- Publication
Canadian Journal of Chemistry, 2012, Vol 90, Issue 9, p717
- ISSN
0008-4042
- Publication type
Article
- DOI
10.1139/v2012-052