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Accession number;01A0231197
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| Title;Formation Mechanism of Technetium Colloids by Irradiation of Bremsstrahlung. |
| Author;
NARUSHIMA HIDEKI
(Tohokudai Daigakuinrigakukenkyuka)
SEKINE TSUTOMU
(Tohokudai Daigakuinrigakukenkyuka)
KINO YASUSHI
(Tohokudai Daigakuinrigakukenkyuka)
KUDO HIROSHI
(Tohokudai Daigakuinrigakukenkyuka)
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Journal Title;Abstracts of Papers. Symposium on Radiochemistry
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Journal Code:F0139B
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ISSN:1345-2762
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VOL.44th;NO.;PAGE.40(2000)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;We have found the radiolytic formation of technetium dioxide hydrate colloids in pertechnetate solutions by the irradiation of bremsstrahlung. A TEM analysis showed the size distribution of the colloids ranging from 50 to 130 nm depending on the dose of irradiation. The amount of the colloids increased with an increase of the dose of irradiation and the formation rate was enhanced at a higher dose rate. We propose a formation mechanism that involve the reduction of pertechnetate by radicals formed through radiolysis of water and disproponation reactions of reduced technetium ions, followed by coagulation reactions. (author abst.) |
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