Definīcija:A radioactive metal that possesses an alpha activity approximately three times greater than that of radium. As a result, one of its isotopes, americium-241, serves as a portable source for gamma radiography. Americium is also used in crystallography research and as a source of neutrons.
VVC izstrādātie vides zinātņu, zemes zinātņu un fiziskās ģeogrāfijas termini