Get Activation Analysis, Volume I PDF

By Zeev Alfassi

ISBN-10: 0849345839

ISBN-13: 9780849345838

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

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Extra resources for Activation Analysis, Volume I

Example text

EXPERIMENTATION The simplest was to obtain the result of' a proposed procedure is to execute it with either a portion of the sample in question or a sample of similar material. The solution of complicated equations and the construction of elaborate computer models are thereby avoided. Optimization by experimentation, however, is often impractical for several reasons: (1) sufficient sample material may not be available, (2) if long decay periods are involved, too much time is required, (3) the cost of irradiation and use of equipment may be too high, and (4) the effort involved may discourage the use of optimization.

Ritter, G. L. and Currie, L. , Conf. Computers in Activation Analysis and Gamma-Ray Spectrometry (Mayaguez, Puerto Rico, 1978), Publ. Department of Energy, 1979, 39. 33. , Survey of Applicable Mathematics, MIT Press, Cambridge, 1969. 34. Nelder, J. , Comput. , 7, 308, 1965. 35. Deming, S. N. and Morgan, S. , Anal. , 45, 278, 1973. 36. Najafi, S. , Dr. Ing. thesis, Ecole Centrale de Paris, March 1983. 37. Najafi, S. , J . Radioanal. , 78, 391, 1983. 38. Najafi, S. I. , Radiochem. Radioanalyt. , 56, 305, 1983.

28 IV. PERFORMANCE PREDICTION To carry out an optimization, it is necessary to predict the results of measurements made under varying values of the adjustable experimental parameters. These data must then be evaluated for the quality of the corresponding procedure and the resulting response value must then be passed to the optimization process. Three approaches have been employed for this sequence: (1) the prediction equations are imbedded in the response function, (2) activation and spectrometry are modeled separately to yield a gamma-ray spectrum which is then evaluated, and (3) actual activation and spectrometry are carried out to yield a spectrum for evaluation.

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Activation Analysis, Volume I by Zeev Alfassi

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