Strontium-90 Fallout from Surface and Underground Nuclear Tests

Science  20 May 1966:
Vol. 152, Issue 3725, pp. 1059-1060
DOI: 10.1126/science.152.3725.1059


Deposition of strontium-90 per unit area per unit fission energy from surface blast of the first Chinese atomic bomb was several times heavier than that from an earlier atmospheric test series. The venting of a Russian large-scale underground test also significantly increased deposition of strontium-90 at Niigata, Japan.