This comparison covers Comparing Radiation Detectors within Radiation Detection for GCSE Physics. Revise Radiation Detection in Extra Topics for GCSE Physics with 13 exam-style questions and 11 flashcards. Use this page as part of a wider topic revision path rather than treating it as an isolated fact. It is section 5 of 12 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
⚛️ Comparing Radiation Detectors
| Detector | Measures | Best for | Limitations |
|---|---|---|---|
| GM tube | Count rate (cpm) | Quick measurements, half-life experiments, detecting all types | Does not measure dose; less efficient for gamma; needs power |
| Film badge | Cumulative dose (mSv) | Worker dose monitoring, identifying radiation types | No real-time reading; must be developed; single use |
| Cloud chamber | Particle tracks | Visualising particle paths, identifying particle type from track shape | Complex setup; not suitable for dose measurement; gamma leaves no track |
Practice questions for Radiation Detection
What instrument is commonly used in school laboratories to detect ionising radiation?
Explain how a Geiger-Muller (GM) tube detects ionising radiation.
Quick recall flashcards
What is count rate?
The number of radioactive decays (or radiation particles) detected per second or minute. Units: counts/second or counts/minute
What does a GM tube measure?
Count rate - the number of radiation particles detected per unit time (usually counts per second or minute)