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Abstract  

An ever-increasing priority of many customers in the radiochemistry field is the turn-around time of sample analysis. While modern instrumentation provides acceptable detection limits with relatively short count times, the sample preparation step remains the time-consuming step in radiochemical analysis. We have developed fast sample preparation techniques for gross alpha/beta analysis based on ultrasonically assisted digestion as part of a mobile radiological analytical laboratory program in place at Los Alamos National Laboratory (LANL).

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Abstract  

Several methods for the electrodeposition of actinides for alpha-spectrometry analysis have been developed over the past few decades, but none have been specifically designed to facilitate rapid analysis in a field situation. This paper describes the development of an electrodeposition procedure that is specifically adapted for use in a mobile lab. Using these techniques one would be able to obtain preliminary results in the event of a radiological incident. Quantitative yields with associated uncertainties have been determined for the procedure. It has also been shown that short deposition times can provide quantitative results.

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Abstract  

Soil and vegetation samples from 33 sites within the northwestern area of the River Nile delta in Egypt have been analyzed for natural and man-made radioactivity. Gamma-ray spectrometric measurements were performed where 214Bi and 214Pb were used for 238U-series determinations, while 208Tl and 228Ac were used for 232Th-series determinations. In addition, alpha-spectrometric measurements were also performed for the determination of different isotopes of uranium and plutonium. Other parameters examined included the determination of radium equivalent activities and relationship between the gamma-radiation values and subsequent dose level determinations and the soil types.

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