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minimum amount of fissile material needed to maintain a nuclear chain reaction, väikseim tuumakütuse kogus, milles tuumalõhustumine saab toimuda iseseisva ahelreaktsioonina
critical mass . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/critical%20mass/1/eng (20.07.2026)
