TY - JOUR
T1 - Evidence for Bismuth-207 in Global Fallout
AU - Aarkrog, Asker
AU - Dahlgaard, Henning
AU - Holm, Elis
AU - Hallstadius, L
PY - 1984
Y1 - 1984
N2 - Samples of lichen, moss, soil and air collected since 1961 in Greenland, Svalbard, Iceland, the Faroe Islands, Sweden and Denmark have been remeasured for γ-emitting radionuclides by Ge(Li) spectroscopy. The samples have shown the presence of 207Bi (physical half-life 38 years), a nuclide which has not been reported earlier in world-wide fallout. The concentrations of 207Bi have been compared with those of 60Co, 125Sb, and 137Cs. From this comparison the production of 207Bi is estimated at 1 PBq. It is assumed that the 207Bi is created in thermonuclear tested explosions in general and that in particular the 55Mt detonation of 30 October 1961 at Novaya Zemlya may have produced this activation product.
AB - Samples of lichen, moss, soil and air collected since 1961 in Greenland, Svalbard, Iceland, the Faroe Islands, Sweden and Denmark have been remeasured for γ-emitting radionuclides by Ge(Li) spectroscopy. The samples have shown the presence of 207Bi (physical half-life 38 years), a nuclide which has not been reported earlier in world-wide fallout. The concentrations of 207Bi have been compared with those of 60Co, 125Sb, and 137Cs. From this comparison the production of 207Bi is estimated at 1 PBq. It is assumed that the 207Bi is created in thermonuclear tested explosions in general and that in particular the 55Mt detonation of 30 October 1961 at Novaya Zemlya may have produced this activation product.
U2 - 10.1016/0265-931X(84)90002-X
DO - 10.1016/0265-931X(84)90002-X
M3 - Journal article
SN - 0265-931X
VL - 1
SP - 107
EP - 117
JO - Journal of Environmental Radioactivity
JF - Journal of Environmental Radioactivity
IS - 2
ER -