Nuclear, Radiochemical and Other Experiments

2 SEPARATION OF PROTO ACTINIUM FROM URANIUM BY SOLVENT EXTRACTION 

When a solution of uranyl nitrate, U02(NOi)2, in hydrochloric acid is shaken with the organic solvent, the bottom aqueous layer will contam Th, and most of the In this layer, will produce the daughter Pa. On counting in a liquid G-M. 

1 The procedure involves the determination of the half-life of the short-lived Pa. This determination of ti/, is useful for the identification and characterisation of radioisotopes. 

2 The liquid G-M counter is used for measuring the activity due to the more energetic p particles of Pa separated from U and Th. 

A plot of logio (corrected count rate) as ordinate against time, as abscissa, is constructed. The half-life, ty is calculated from the slope of the linear plot  

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The previous section touched the problems which arise in the presence of unwanted aerosols in the gas-phase chemistry experiments. On the other hand, intentionally produced aerosols have found important application in nuclear chemical and radiochemical experiments as a tool for transportation of the accelerator produced tracers. 

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