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Download 7D10.10 Geiger Counter and Samples
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7D10.10 Geiger Counter and Samples Abstract A Geiger counter is a device used to measure ionizing radiation. The Geiger counter contains a Geiger-Müller tube which is filled with an inert gas at low pressure. A high voltage is placed across the tube so that a current is induced when the gas is ionized by radiation. The current generates a sound which signifies a count. The Geiger counter can be used to measure the decays of various different materials and compare it to the background radiation. Picture Safety Concerns As always when working with radioactive material it is best to minimize exposure to radiation. That being said, the radioactive items used in this demonstration are everyday materials which represent a insignificant health hazard. None of the radioactive materials should be swallowed. Equipment • Geiger Counter • Box of Common Radioactive Items 1 Procedure Plug in the Geiger counter and hold the Geiger-Müller tube next to the radioactive samples take measurements. The range, response time, volume and voltage can be varied using the knobs on the front of the Geiger counter. 2
