Combined Science GCSE
Count rate
What Count rate means in Combined Science GCSE, as defined for AQA.
Definitions of Count rate
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Reference: AQA
The reading from a detector, which is usually lower than activity because not every emitted particle or wave reaches the detector.
The number of decays recorded each second by a detector such as a Geiger-Muller tube.
Measured in counts per second and is not the same as activity in Bq.
Topics that use Count rate
- Radioactive decay and nuclear radiation (AQA GCSE)
Related terms
- Activity
- Alpha radiation
- Becquerel
- Beta radiation
- Gamma radiation
- Ionising radiation safety
- Random nature of radioactive decay
- Source selection
Using Count rate in the exam
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