Centrifugal extraction of highly enriched tin isotopes and increase of specific activity of the radionuclide Sn-119m on the gas centrifuge cascade

摘要

This work contains the results of research on centrifugal enrichment of Sn-118 isotope followed by irradiation and, finally, a second centrifugal enrichment to produce high specific activity Sn-119m. Non-steady-state separation methods were used for the effective extraction of the radionuclide Sn-119m from the irradiated target. As a result of this work, radiation sources based on Sn-119m were obtained with a specific activity of 500 mCi/g. This is 100 times greater than the specific activity obtained after irradiation in the reactor alone. In addition, the sources had an previously unattainable radio-purity ratio of Sn-113/Sn-119m of approximately 10(-6). (C) 2001 Elsevier Science B.V. All rights reserved. References: 3