Chemical dosimetry:

It is based on the measurement of chemical reaction products produced by radiation.

The Fricke dosimeter uses the radiation-induced oxidation of Fe²⁺ ions to Fe³⁺. The conventional Fricke dosimeter can measure dose-rates up to 10 Gy/pulse.

The thiocyanate dosimeter uses (SNC)₂^- ions produced in aqueous solution of potassium thiocyanate. The detection limit is about 0.1 Gy.

The ethanol-chlorobenzene dosimeter uses the hydrochloric acid formation. Dose range: 0.1 kGy – 1 MGy (see details in chapter on Gamma Irradiation Facility)

Radiochromic films (films and pieces of polymers) exposed to radiation change their colour and the absorbance (e.g. at 656.5 nm) measured can be related to dose by calibration

Selected Publications

A. Kovács: Study and applicability of routine methods in electron beam and
“Bremsstrahlung” dosimetry; progress Report No. 5135/R1/RB for IAEA (1996)

A. Kovács, A. Miller: Use of ethanol-monochlorobenzene dosimeters at electron accelerators,
Radiat. Phys. Chem. 36/6 (1990) 709-713

A. Kovács, K. K. Mehta, A. Miller: Characterization of linear electron accelerators using
reference and routine dosimetry methods; Proc IAEA Symp. High-Dose Dosimetry,
Vienna (1990)

A. Kovács, M. Baranyai, L. Wojnárovits: Characterization of fluorometric, calorimetric,
oscillometric and radiochromic dye film dosimeters under processing conditions at electron
accelerators, in: Dosimetry for radiation processing, IAEA-TECDOC-1156, IAEA,
Vienna June 2000, pp 71-79

See also chapter on Gamma Irradiation Facility