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

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Original file ‎(1,250 × 935 pixels, file size: 141 KB, MIME type: image/jpeg)

Summary

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.

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current21:07, 8 January 2017Thumbnail for version as of 21:07, 8 January 20171,250 × 935 (141 KB)127.0.0.1 (talk)<p>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. </p>
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