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Global Transport Rates of ~137Cs and ~239+240Pu Originating from the Nagasaki A-bomb in 1945 as Determined from Analysis of Canadian Arctic Ice Cores

机译:根据加拿大北极冰芯分析确定的1945年长崎原子弹爆炸产生的〜137Cs和〜239 + 240Pu的全球传输速率

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摘要

Recent advancements in analytical technology make it possible for artificial radionuclides released from nuclear explosions to be detected in Arctic ice core layers. The fission product, ~137Cs, and the unexpended fission material, ~239+240 Pu, originating from the Nagasaki A-bomb of August 1945, were measured by collecting 10 ice cores on the Agassioz ice cap, Ellesmere Island, Canada. The deposition rates were 0.020 mBq cm~-2 for ~137Cs and 0.0016 mBq cm~-2 for ~239+240 Pu, originating from Nagasaki.
机译:分析技术的最新进展使人们有可能在北极冰芯层中检测到由核爆炸释放的人造放射性核素。通过在加拿大Ellesmere岛的Agassioz冰帽上收集10个冰芯,测量了源自1945年8月长崎原子弹的裂变产物〜137Cs和未消耗的裂变物质〜239 + 240 Pu。源自长崎的沉积速率对于〜137Cs为0.020 mBq cm〜-2,对于〜239 + 240 Pu为0.0016 mBq cm〜-2。

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