Detecting Radiation Flashcards

All 3 cards in this deck

How does a Geiger–Müller tube measure radioactivity?

It detects each particle or ray that enters it, and the counter displays the count, giving the count rate.

How does photographic film detect radiation?

The film darkens (fogs) when exposed to ionising radiation — the more radiation, the darker it goes.

How do you correct a measured count rate for background radiation?

Measure the background count rate with the source removed, then subtract it from the count rate measured with the source in place.