The Geiger–Marsden experiment

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Hans Geiger (1882-1945) and Ernest Marsden (1889-1970) discover large angle deflections of alpha particles by thin metal foils. The unexpected results of the experiment demonstrated for the first time the existence of the atomic nucleus.

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Citation:
Editors. "The Geiger–Marsden experiment". The Literary Encyclopedia. First published 01 May 2009
[http://www.litencyc.com/php/stopics.php?rec=true&UID=6419, accessed 20 April 2014.]