Abstract
A gas flow system has been developed for the transport of product atoms from the fast neutron induced fission of 238U and the thermal fission of 235U over several meters distance. The dependence of the transport efficiency on different gases and mixtures of gases was investigated. The highest overall efficiencies (∼ 70%) were achieved with pure ethylene and mixtures of ethylene with nitrogen as the carrier gas. Methods for collecting the fission products from the gas stream directly into a liquid phase for rapid, continuous chemical separations have been tested. The gas transport system has been coupled to a thermochromatographic column and used successfully for chemical separations of short-lived fission products.
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