The mechanism of the fricke dosimeter
Abstract
An amplified mechanism is given for the response of the Fricke dosimeter to radiation. OH radicals react with Cl - to give, stepwise, Cl atoms and Cl 2-, both of which oxidize Fe 2+ and FeSO 4. Hydrated electrons and H atoms give rise to HO 2 radicals which form Fe 3+HO 2-. Part of this complex dissociates to give Fe 3+ and H 2O 2, while part reacts with SO 42- to give Fe 3+HO 2-SO 42-. Part of this dissociates giving FeSO 4+, while part forms Fe 3+HO 2-(SO 42-) 2, which dissociates giving Fe(SO 4) 2-. Hydrogen peroxide reacts with Fe 2+ and FeSO 4 to give, respectively, Fe 3+ and FeSO 4+. Equilibrium proportions of Fe 3+, FeSO 4+ and Fe(SO 4) 2- are attained through reaction of Fe 3+ with SO 42- and FeSO 4+ with SO 42-.
- Publication:
-
International Journal for Radiation Physics and Chemistry
- Pub Date:
- April 1975
- DOI:
- 10.1016/0020-7055(75)90075-3
- Bibcode:
- 1975IJRPC...7..363J