الفهرس 
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Abstract
The presented work is a continuation of a programe started in 1971 ; namely the study and preparation of some applicable radioisotopes characterised by medium half - lives. The process of activation analysis of trace elements in dead matrices, such as that developed in our laboratory for oil, for example, necessiates the thorough knowledge of the quantitative and qualitative formation of the radioisotopes produced in all exposed chemical elements.