Polyvinyl toluene

Polyvinyltoluene (PVT, polyvinyl toluene) is a synthetic polymer. When subjected to ionizing radiation (both particle radiation and gamma radiation), it acts as a scintillator. The amount of visible radiation emitted is proportional to the absorbed dose and the radiation's stopping power. PVT is used e.g. as a material for scintillators for ion dosimeters.

PVT can be damaged by radiation with high stopping power, e.g. ion beams. Such radiation breaks the C-H bonds and significantly reduces the luminescence yield. 

PVT is sometimes mixed with anthracene or other organic scintillators.