Target Chemistry of Cesium; Isolation of Ba133, 134

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Abstract
Barium (Ba133, 134) obtained by dn and d2n reactions of spectroscopically pure cesium chloride was separated in quantities of −9 gram without addition of common barium. The procedure studied involves adsorption of barium on hydrous ferric oxide under conditions at which cesium ions remain in solution. The effect of (a) pH of solution and (b) varying quantities of ferric hydrous oxide on the fraction of Ba adsorbed from solution containing −9 g Ba, keeping other factors constant, showed that the fraction of Ba adsorbed, y=k[Z(X — X0)]λ, Z being the quantity of adsorbent (from 1×10−5 to 3×10−4 g atom Fe); X, the OH− concentration in solution (from 3×10−9 to 3×10−6); X0, the critical concentration of OH− necessary to maintain the adsorbent in the solid state. When pH was kept constant the value of λ for y=k′Zλ was found to be 0.35, and when the quantity of adsorbent was constant the λ for y=k″(X — X0)λ was 0.33. The fact that the two experimental slopes were so nearly the same in spite of certain variations in experimental conditions is taken as support for two assumptions made in the derivation of the expression viz., (1) the fraction of barium adsorbed from a very dilute solution depends on the quantity of adsorptive centers in the solid phase and (2) the quantity of adsorptive centers in the solid phase available for barium adsorption is proportional to the OH− concentration in solution, other factors being constant. Adsorption procedure is described.

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