Edexcel IGCSE Physics 7.9 Detecting Ionising Radiation
Practise selecting photographic film or a GM detector and correcting measured count rate for background radiation.
- Syllabus
- First assessment 2019
- Course
- Physics 4PH1
Exam points
- name photographic film or a Geiger–Müller tube as a suitable radiation detector
- measure background for the same duration and subtract it from the source count
- repeat count-rate readings, identify anomalies and calculate a justified mean
7.9 Detecting ionising radiation question 1
[Maximum number: 1]
This question is about radioactive isotopes used for medical imaging.
When iodine-131 decays, it emits beta radiation and gamma radiation.
A patient swallows a tablet containing iodine-131. The radiation emitted can be detected outside the body.
State the name of a piece of equipment that can detect the radiation emitted by iodine-131.
Geiger-Muller tube / GM tube / photographic film / scintillator
Accept:
- detector or counter for tube
Ignore:
- radiation detector
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