Editing Geiger–Müller tube (section)

===Neutron detection===
{{main|Neutron detection}}
G–M tubes will not detect [[neutron]]s since these do not ionize the gas.  However, neutron-sensitive tubes can be produced which either have the inside of the tube coated with [[boron]], or the tube contains [[boron trifluoride]] or [[helium-3]] as the fill gas, or the tube is wrapped in about {{cvt|0.5|mm|in|frac=50}} thick [[cadmium]] foil.<ref>{{Cite web |url=https://frank.pocnet.net/sheets/030/1/18503.pdf |title=Philips 18503 datasheet |access-date=2022-01-03 |archive-date=2022-01-03 |archive-url=https://web.archive.org/web/20220103011420/http://www.frank.mif.pg.gda.pl/sheets/030/1/18503.pdf |url-status=live }}</ref> The neutrons interact with the boron nuclei, producing alpha particles, or directly with the helium-3 nuclei producing hydrogen and [[tritium]] ions and electrons, or with the cadmium, producing gamma rays.  These energetic particles interact and produce ions that then trigger the normal avalanche process.