Ionizing particles and Geiger counter
One of the most popular tools for measuring ionizing radiation and particles is the scintillating Geiger-Müller counter using a metal cylinder containing a rarefied gas and a wire stretched close so then to establish a potential difference near the limit necessary to establish a discharge, so just have an ionizing particle strikes the tool to charge the spring discharge, which will be appropriately amplified and counted acoustically and visually. Hans Geiger (1882 - 1945) German physician assistant of Rutherford in Cambridge was one of the researchers who studied the trajectory and the position of alpha particles in the Cavendish laboratory, using the thin metal layers to see the difference in penetration of radiation and thus allowing later to E. Rutherford to develop in 1911 the atomic model of planetary type.
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Date: 16/04/2011
 article n°: 1556
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