22. Investigation of the variation of intensity of gamma radiation with distance
- 00:30 Why is there a background count?
gamma source (e.g. 185 kBq (5 μCi) Cobalt 60 ‘closed’ source)
source holder or retort stand, boss and clamp
counter with integral power supply for GM tube
geiger muller tube suitable for gamma detection
The radioactive source may cause cancer
See CLEAPSS Guide L93 for guidance