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File:Early Geiger counter, made by Hans Geiger, 1932. (9663806938).jpg

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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.

Early Geiger counter, made by Hans Geiger, 1932.

Author Science Museum London / Science and Society Picture Library


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28 August 2013

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current10:25, 3 September 2013Thumbnail for version as of 10:25, 3 September 20131,250 × 935 (141 KB)File Upload Bot (Magnus Manske)Transferred from Flickr by User:Mrjohncummings

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