High precision elemental abundances for tektites and crater glasses-thorium, uranium and potassium
| Autor: | O. Müller, I. Perlman, J. Yellin, W. Gentner |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Health
Toxicology and Mutagenesis Potassium Public Health Environmental and Occupational Health chemistry.chemical_element Mineralogy Thorium Uranium Type (model theory) Pollution Analytical Chemistry Nuclear Energy and Engineering chemistry Impact crater Internal consistency Radiology Nuclear Medicine and imaging Neutron activation analysis Spectroscopy |
| Zdroj: | Journal of Radioanalytical Chemistry. 76:35-47 |
| ISSN: | 1588-2780 0134-0719 |
| DOI: | 10.1007/bf02519653 |
| Popis: | Thorium, uranium and potassium mean abundances for 15 Ivory Coast tektites, 23 Australites, 10 Philippinites, 25 Thailandites, 16 Bediasites and 12 Moldavites are reported. Abundances are also reported for Muong Nong type tektites, Nordlinger Ries crater glass, Bosumtwi crater glass and Darwin crater glass. Previous measurements are reviewed. The value of the present work lies in the fact that high precision instrumental neutron activation analysis was employed to measure a large number of tektites encompassing the major strewn fields. Four independent measurements of thorium were made for each specimen with two Ge(Li) gamma spectrometers. Two of the measurements were based on the 312 keV gamma of233Pa, while the other two measurements were based on the uranium\(K_{\alpha _1 }\) and\(K_{\alpha _2 }\) X-rays which accompany the decay of233Pa. Internal consistency among the four thorium measurements is high. The uranium measurements were based on the 106 keV gamma of239Np, while potassium was measured from the 1524 keV gamma of42K. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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