Activity and half life

A device used to measure radiation.

The number of radiation events detected per unit of time, often measured in counts per second (cps).

The time required for half of the radioactive atoms in a sample to decay.

The unit of measurement for radioactive activity, equivalent to one decay per second.

The activity of the source decreases rapidly; highly dangerous initially but quickly becomes safe.

Releases small amounts of radiation over a prolonged period, posing a long-term exposure risk.