By Zeev Alfassi

This well timed booklet covers advised measurements in addition to behind schedule activation measurements utilized in chemical research of the weather. It describes a few of the chances of activation: neutrons, charged ions, and photons. additionally mentioned are the benefits and drawbacks of every activation procedure. those volumes are vital for these in geology, archaeology, biology, analytical chemistry, radioanalytical and nuclear chemistry, the semiconductor undefined, and others.

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43 1. 43 2. 43 3. 44 E. Sample Size .............................................................. 44 Response Functions .............................................................. 44 A. 44 B. Multielement Determination .............................................. 48 A. 48 B. Simulation ................................................................ 48 C. Experimentation .......................................................... 49 A. Analytic Solution .........................................................

42 4. 42 5. 43 D. 43 1. 43 2. 43 3. 44 E. Sample Size .............................................................. 44 Response Functions .............................................................. 44 A. 44 B. Multielement Determination .............................................. 48 A. 48 B. Simulation ................................................................ 48 C. Experimentation .......................................................... 49 A. Analytic Solution .........................................................

Counting Time Several requirements must be met in fixing the duration of radiation measurements. The counting time must be sufficient for the registration of the number of counts per unit analyte mass defined by the required sensitivity. Unless special methods are e m p l ~ y e dthe , ~ counting time should be small compared to the rate at which the radioactivity of the sample is changing in order to preserve the accuracy of dead time corrections. Finally, the counting time must be sufficiently short to permit the efficient processing of sets of samples.

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