Fallout of 58Co, 60Co and 54Mn in eastern Canada from nuclear weapons testing

Abstract

Fallout of the 58 Co, 60 Co and 54 Mn radionuclides was observed in a small river located in eastern Canada. These activities were found in sludge samples collected at a water filtration plant. They were attributed to the Chinese thermonuclear test of November 17, 1976. Their relative formation rates would indicate that they were induced by 14-MeV neutron activation of a bomb casing material with a high nickel content.