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Monitoring the equilibration of 228Th and decay products over time after extraction from ivory

Schmidberger, Andreas ; Schupfner, Robert


The worldwide population of elephants shows a rapid decline due to trafficking of ivory. Hence, a method is needed for the age determination to distinguish legal from illegal ivory. The analysis of Th-228 and Th-232 in ivory can be used for this purpose. This study provides a technique for the analysis of Th-228 in ivory. The thorium was extracted from ivory and measured after various time ...


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