ISOTOPIC CHARACTERIZATION OF TARGETS FOR NUCLEAR MEASUREMENTS AT CBNM
Nuclear measurements for which "nuclear" targets are prepared are almost always isotope specific i.e. related to a particular nuclide present. There are essentially two ways to determine the number of atoms of this particular nuclide: (1) By determination of the amount of element, to which the nuclide belongs, on the target via classical means: weighing, subtraction of impurities, calculation of element amount using known stoichiometry of the chemical compound in which the element is incorporated, finally, measurement of the isotopic composition in order to determine the fraction of the nuclide concerned in the element. (2) By isotope dilution mass spectrometry where a change in the isotopic composition of the "target" is induced by adding a known number of atoms (called "spike" of the element with a quite different composition. Measurement of the resulting change in isotopic composition yields directly the number of atoms of the nuclide under investigation. The method is highly selective, accurate and isotope specific.
Bibliographic Reference: 12TH WORLD CONFERENCE OF THE INTERNATIONAL NUCLEAR TARGET DEVELOPMENT SOCIETY, ANVERS (BELGIUM), SEPT. 25-28, 1984. PUBL. IN: NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH, VOL. A236 (1985), PP. 617-626
Record Number: 1989124015100 / Last updated on: 1987-01-01
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