Ka rite ki te pūrere kotahi-taahiraa, e kua reira kua he tono taimaha o te fission whakarei. ka riro te reira i te mahi tuatahi, no te whakaurua ki te tuarua o te rua-taahiraa patu thermonuclear. te ingoa US, whakaoho Karaka, i haere mai i Teller: huaina e ia te reira e, no te mea kia "whakaara ake te ao" ki te taea o te tūponotanga o te Super. te ingoa Russian mo te taua hoahoa ko atu whakaahuatanga: Sloika (Russian: Слойка), he keke paparanga. i whakamatauria te Sloika Soviet kotahi-taahiraa i runga i 12, 1953. No te putanga kotahi-taahiraa US, engari ko te Operation Union Castle i te 26 o Aperira, 1954, i werohia he pūrere thermonuclear rua-taahiraa.
6.9 megatons