🌐EnglishEnglishEspañolFrançais中文日本語EntityQ3045621· pop 5· linked from 18 articlesOrphan sourceself-contained radioactive source that is no longer under proper regulatory controlAvailable in 5 languagesEspañolFrançais中文日本語via Wikidata sitelinks · CC0Connectionsnuclear physicsEntityelectrostaticsEntityCategoriesRadiation accidents and incidents