Tag "cobalt58"

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Cobalt 58 was detected in Gunma, half-life is 71days, “Possibile recriticality around after April”

  Cobalt 58 was detected from the black substance in Gunma. (cf. Black substance found at Harajuku station in Tokyo, “21,346 Bq/Kg”) Co-58 is produced from neutron ray, the half-life