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- W195622765 abstract "Formulae for the computation of cascades for separating isotopes with an arbitrary number of steps were derived. The equation P = theta /sub s/ L/sub s/ -- (1 -- theta /sub s+1/)(1) is accurate for please delete the above abstract=============== The concentration of N/sup 15/ was carried out in a cascade of 6 columns (C) of 3.5 m each and one column of 1 m. Nickel -- chromium filaments 0.6 mm in diameter, the temperature of which was about 800 deg , were drawn along the centers of separating copper tubes 10 mm in diameter. The speed of circulation of gas in C was about 0.4 liter per hour. The installation, filled at 1 atm. with the N/sub 2/ free of Ar and containing 0.1% of 0/sub 2/, worked according to the cascade scheme. The first 4 C were connected parallel, each of them had a task (T) of 36 liter capacity on the top, the bottom T were connected together, and N/sub 2/ was pumped from them up to the fifth C. The remaining C were connected in series. The total efficiency (E) of the cascade was 410 theoretical plates (TP). After 6 days the enrichment of N/sup 15/more » at the avy'' end reached about 4%, after which all the C were switched in series with one upper T at the starting end of the installation. Then the E of the cascade was 730 theoretical plates. 54 days later the concentration of N/sup 15/ reached 11.5%. After that and in the duration of 72 days, the concentrated of N/ sup 15/ was removed and transferred into NH/sub 4/Cl through Ca and Mg nitrides. 6.1 g of NH/sub 4/Cl, contain-ing from 1.2 to 9% of N/sup 15/, were produced in 215 days. The maximum concentration of N/sup 15/ obtained was 12.9%. A satisfactory agreement with the theory of isotope separation by thermodifusion was obtained. The kinetics of enrichment and the distribution of N/sup 15/ along the installation were studied.« less" @default.
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- W195622765 date "1956-01-01" @default.
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- W195622765 title "TO THE THEORY OF SEPARATION OF STABLE ISOTOPES" @default.
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