Mache (symbol ME from German Mache-Einheit, plural Maches) is a unit of volumic radioactivity named for the Austrian physicist Heinrich Mache.[1] It was defined as the quantity of radon (ignoring its daughter isotopes; in practice, mostly radon-222) per litre of air which ionises a sustained current of 0.001 esu (0.001 StatAmpere).
References
edit- ^ Riezler, Wolfgang [in German] (1950). Einführung in die Kernphysik (4 ed.). H. Hübener. p. 49. Retrieved 2009-09-25.
 | This radioactivity–related article is a stub. You can help Wikipedia by expanding it. |
 | This standards- or measurement-related article is a stub. You can help Wikipedia by expanding it. |