[{WikipediaArticle oldid='223105341'}]



[{VerifyArticle user='eertl' template='Standard' date='13. November 2014' page-date='2014' comment='Überprüft, nach Mortimer, C.E., Müller, U., Chemie. Das Basiswissen der Chemie; Bergmann, Schaefer, Lehrbuch der Experimentalphysik Band 4; bis auf den Absatz "Freie Neutronen"' funder='53' }]
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| A schematic diagram of the experiment James Chadwick used to discover the neutron in 1932.  At left, a polonium source was used to irradiate beryllium with alpha particles, which induced a type of uncharged radiation initially thought to be gamma rays.   When this radiation struck paraffin wax, protons were ejected with ca. 5.5 MeV kinetic energy.  The protons were observed using a small ionization chamber, called a counter, that detected a signal recorded on an oscillograph.  Adapted from J. Chadwick, The Existence of a Neutron, Proc. Royal Society London, Series A, 136, 692-708, 1932.| Eigenes Werk| Bdushaw| [{Image src='https://www.austria-forum.org/cc/images/slim/by-sa.png' alt='CC BY-SA 4.0' align='center' link='https://www.austria-forum.org/cc/by-sa-40.html' target='_blank'}]| Datei:Chadwick Neutron Discovery.png
| Begriffsklärungs-Icon (Autor: Stephan Baum)| Eigenes Werk ( Originaltext: Own drawing by Stephan Baum ) Original Commons upload as File:Logo Begriffsklärung.png by Baumst on 2005-02-15| Stephan Baum| [{Image src='https://www.austria-forum.org/cc/images/slim/publicdomain.png' alt='Public domain' align='center' link='https://www.austria-forum.org/cc/public-domain-10.html' target='_blank'}]| Datei:Disambig-dark.svg
| The quark structure of the neutron| Eigenes Werk| Jacek rybak| [{Image src='https://www.austria-forum.org/cc/images/slim/by-sa.png' alt='CC BY-SA 4.0' align='center' link='https://www.austria-forum.org/cc/by-sa-40.html' target='_blank'}]| Datei:Neutron quark structure.svg
| | | | [{Image src='https://www.austria-forum.org/cc/images/slim/by-sa.png' alt='CC BY-SA 3.0' align='center' link='https://www.austria-forum.org/cc/by-sa-30.html' target='_blank'}]| Datei:Wiktfavicon en.svg
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