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- nickel coated aluminium card with thermoluminescent dosimeter discs (1):
- disc: calcium sulphate doped with dysprosium (CaSO4:Dy), in Teflon matrix
- disassembled thermoluminescent dosimeter (2)
- labelled image (3):
- radiation falls on the side of the yellow arrow
- orange arrows denote a cut in the thermoluminescent dosimeter card and a nob for the same on the internal side
The aluminium faces the radiation and copper faces the thermoluminescent dosimeter disc.