Image: Early Geiger counter, made by Hans Geiger, 1932. (9663806938)
Description: Hans Geiger (1882-1945) worked closely with Ernest Rutherford (1871-1935) to develop radiation measuring devices. In this early example a low pressure gas is held in a copper cylinder fitted with a handle. An electrical voltage is then applied between the copper casing and a thin wire running along its centre. The particle entering the cylinder causes a burst of electric current which is registered on a counter. This particular Geiger counter was used by James Chadwick, the discoverer of the neutron.
Title: Early Geiger counter, made by Hans Geiger, 1932. (9663806938)
Credit: Early Geiger counter, made by Hans Geiger, 1932. Uploaded by Mrjohncummings
Author: Science Museum London / Science and Society Picture Library
Usage Terms: Creative Commons Attribution-Share Alike 2.0
License: CC BY-SA 2.0
License Link: http://creativecommons.org/licenses/by-sa/2.0
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