Traceable absorption measurements for optical dosimeters
A range of optical spectrophotometers is used for traceable measurement of absorbed dose in Risø B3 and other optical dosimeters. The instruments determine absorbed dose through measurement of optical absorption of irradiated materials.
The Genesys spectrophotometers are primarily used for routine measurements and training activities, including evaluation of GEX dosimeters. The Unicam UV4 is used for certification of reference step tablets applied in the Risø B3 film dosimetry system, while the Shimadzu UV-2700 is used for research and method development.
Measurement traceability is ensured through the use of calibrated absorption and wavelength standards, linking all measurements to the SI system of units.
Fact box – Spectrophotometers
Application: Optical dosimetry
Measurement principle: Optical absorption vs. wavelength
Traceability: Maintained using calibrated absorption and wavelength standards
Unicam UV-4
Wavelength range: 190 – 900 nm
Primary use: Certification of reference tablets (RisøScan system)
