Schmidberger, Andreas and Schupfner, Robert (2019) Monitoring the equilibration of Th-228 and decay products over time after extraction from ivory. JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, 320 (1). pp. 139-143. ISSN 0236-5731, 1588-2780
Full text not available from this repository. (Request a copy)Abstract
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 periods applying -spectrometry until a secular radioactive equilibrium between Th-228 and its decay products was established. An equilibration period of 32days was found. The uncertainty of the determination of the activity of Th-228 could be reduced by integrating the counts of the equilibrated decay products into the determination process.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | URANIUM; SR-90; C-14; Ivory trafficking; Age determination; Secular radioactive equilibration; Thorium series; -Spectrometry |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Instrumentelle Analytik (Prof. Frank-Michael Matysik) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Apr 2020 06:26 |
| Last Modified: | 15 Apr 2020 06:26 |
| URI: | https://pred.uni-regensburg.de/id/eprint/27296 |
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