Name a detector type used to measure gamma radiation in real time and describe a basic principle.

Name a detector type used to measure gamma radiation in real time and describe a basic principle.

• A. Geiger-Mueller (GM) detector; it counts ionizing events and provides a readout of activity.
• B. Thermoluminescent dosimeter; it stores dose.
• C. Neutron detector; it detects neutrons, not gamma.
• D. Photographic film badge; it records dose over time.

Answer: (A)