Differential Movement of Plutonium and Americium in Lungs of Rats following the Inhalation of Submicron Plutonium Nitrate Aerosol
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In case of the inhalation of plutonium nitrate (contained <SUP>241</SUP>Am) aerosols in rats, the activity ratios of <SUP>241</SUP>Am to total α activity in lungs of rats decreased with the elapsed day after inhalation. They were 11.84%, 11.00%, 9.46% and 8.40%, immediately after inhalation, 14 days, 32 days and 80 days after inhalation, respectively. These results showed that americium was more rapidly removed from lungs of rats than plutonium.<BR> Therefore, when the lung burden of plutonium is suggested by the in vivo measurement used the γ-rays of 60 KeV emitted from <SUP>241</SUP>Am, it should be noticed that the differential movement of these two elements exists.<BR> On the other hand, the movement of <SUP>238</SUP>Pu and <SUP>239, 240</SUP>Pu in lung of rat was almost same during 80 days after inhalation.
- 日本放射線影響学会の論文
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