Physics Athens 2016

Chemical standard (Fricke)

- dose determined by measuring chemical change in an irradiated medium - Fricke dosimetry: dosimeter consists of Fe 2+ in water (solution highly water equivalent) - due to ionizing radiation Fe 2+  Fe 3+

- D =  M / (  ·G(Fe 3+ )) -  M = mole Fe 3+ /liter

-  = 1.024 kg/liter for standard Fricke solution - G(Fe 3+ ) = 1.607·10 -6 mole Fe 3+ /J, for 60 Co  dosimetry: determine concentration of Fe 3+ in Mole/liter