4. Radioactive signal detection
Detection must be adapted to the type of radiation emitted by the tracer:
electromagnetic radiation (γ, X): iodine 125, cobalt 57 ;
particulate radiation β – soft (tritium, carbon 14) and β – hard (phosphorus 32, sulfur 35).
To detect and quantify high-energy electromagnetic (γ, X) or particulate β – radiation, we use a probe consisting of a solid scintillator and a photosensitive cell, together forming the photomultiplier. In the case of very low-energy particle radiation (e.g. tritium, carbon 14), the scintillator is liquid, so that it is in contact with the radioactive source.
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Radioactive signal detection
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