Ultrafast Chemical Separations (1993) / Chapter Skim
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1. Introduction
1. Introduction
Pages 3-5
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From page 3... ...
As me need to isolate and study shorter and shorter half-lives has grown, new techniques have been developed, to the extent Cat today's separation techniques are challenging chemical reaction rates and Me concepts of physical design. An example of the fonner is the development of continuous gas-phase chemical reactions, and an example of the latter is the development of the continuous-flow solvent extraction system, SISAK, that has revolutionized solvent extraction techniques by bringing them fimm batch processes that required several minutes to continuous SISAK separations that require only a few seconds.
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From page 4... ...
In works to date, the absence of any identifiable species after appropriate chemical separations has led Hem to conclude that superheavy elements with half-lives in me range from ~ Is to 10 yr were not produced with cross section greater than ~34 to 1~35 cm2 Radiochemical separations provide high-resolution charge separation for the products of nuclear reactions. As seen from the previous paragraphs, radiochemical separations have been used widely In different branches of nuclear and radiochemist~y.
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From page 5... ...
A fast separation procedure for lanthan~des using a small ion-exchange column was reported that was able to separate any specific landslide within 20 to 25 minutes [Ren641. Multistep solvent extraction procedures requiring several minutes were used for the study of tin and antimony isotopes formed in fission [Hag62, Ren661.
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