3B SCIENTIFIC® PHYSICS
Geiger-Müller Counter Tube U8533430
Instruction sheet
07/07 SP/ALF
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1Handling rod
2BNC socket
3Supporting clip
4Housing
5Protective cap
1. Safety instructions
If too high a voltage is applied, the life of the counter tube will be reduced and its characteristic curve will be altered (the gradient of the plateau will increase).
•Do not apply a voltage higher than 600 V.
The mica window is only 0.03 mm thick and is subjected to the external atmospheric pressure.
•Caution! Do not touch the mica window.
•Replace the protective cap after each use.
The glass seal of the counter tube is not resistant to impacts and pressure.
•Do not subject the tube to knocks.
•Handle the counter tube especially carefully when it is taken out of its supporting clip.
2. Description
The Geiger-Müller counter tube is a halogen selfquenching trigger counter tube for the detection of α-, β-, γ- and X-radiation.
The counter tube consists of a chromium steel cylinder that is filled with an argon-neon mixture together with a halogen gas as a quenching agent. It is closed at one end by a very thin mica window and at the other end by a glass seal, both of which are gas-tight. A thin wire (the counter wire) is arranged axially in the cylinder, which it enters through the insulating glass seal. The counter tube is contained within a metal housing that is fitted with a shielded connecting lead and a BNC socket. A handling rod is attached to the housing by a detachable clamp. The mica window is protected by a removable plastic cap.
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