Published in:Jülich : Kernforschungsanlage Jülich, Verlag, Berichte der Kernforschungsanlage Jülich 1822, 24 p. (1983).
Language:
English
Origination:
Footnote:
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Description:
A simple method is described for instrumental multielement thermal neutron activation analysis using a monostandard. For geological and air dust samples, iron is used as a comparator, while sodium has advantages for biological materials. To test the capabilities of this method, the values of the effective cross sections of the 23 elements determined were evaluated in a reactor site with an almost pure thermal neutron flux of about 9 $\cdot$ 10$^{12}$ n $\cdot$ cm$^{-2}$ $\cdot sec$^{-1}$ and an epithermal neutron contribution of less than 0,03 %. The obtained values were found to agree mostly well with the literature best values ofthermal neutron cross sections. The results of an analysis by activation in the same site agree well with the relative method using multielement standard and for several standard reference materials with certified element contents. A comparison of the element contents obtained by the monostandard and relative methods together with corresponding precisions and accuracies is given. A brief survey of the monostandard method is presented.