Have you used a scintillation counter before?

Because of your training, you know that a scintillation counter is used to measure radiation in a variety of applications including hand-held radiation survey meters, personnel and environmental monitoring for radioactive contamination, medical imaging, radiometric assay, nuclear security and nuclear plant safety. Although you may not know more than what you learned about in school that's fine.

"A Scintillation Counter, measures radiation."