Automated System for Selective Fission Product Separations Applied to the Study of exp 113-115 Pd

摘要

A microcomputer-controlled radiochemical separation system has been developed for the isolation and study of fission products with half-lives of greater than or equal to 10 s. The system, based upon solvent extraction with three centrifugal contactors coupled in series, provides both rapid and highly efficient separations with large decontamination factors. This automated system was utilized to study the radioactive decays of exp 113-115 Pd via solvent extraction of the Pd-dimethylglyoxime complex from exp 252 Cf fission products. As a result of this effort, gamma rays associated with the decay of approx. 90-s exp 113 Pd, 149-s exp 114 Pd and 47-s exp 115 Pd have been identified. The assignment of masses to each of these Pd radioactivities has been confirmed from observation of the growth curves of their respective Ag daughters. In addition, previously unreported Ag gamma rays have been assigned; one to the decay of 69-s exp 113 Ag, and two to the decay of 19-s exp 115 Ag. (ERA citation 06:006340)