Page 804 - Radiation Safety
P. 804
Gas-filled Detectors
Geiger-Muller (GM) Counter
• The tube is sealed and filled at low pressure with an inert gas such as
argon, helium or neon with some gases added.
• Useful for monitoring low-level beta and gamma radiation.
• High sensitivity.
• Meters of choice for monitoring contamination and searching of lost
radiation sources.
• Relatively long dead time and makes them unsuitable for accurate
counting at high counting rates.
