Considerations about the226Ra gross alpha counting determination |
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| Authors: | J. M. Godoy H. Schüttelkopf |
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| Affiliation: | (1) Institute of High Energy Physics, Academia Sinica, P.O. Box 2732, Beijing, (China);(2) National Bureau of Oceanography, First Institute of Oceanography, (China);(3) Institute of Geochemistry, Academia Sinica, Guiyang, (China) |
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| Abstract: | Chemical elemental compositions of some silicate, magnetic and glass spherules were investigated with INAA. The elements determined include Os, Ir, Ni, Co, Fe, Cr, Au, La, Ce, Sm, Eu, Yb, Lu and Sc etc. The elemental correlation, as well as their enrichment (or depletion) factors relative to Cl chondrite were examined. The high concentrations of the refractory siderophile elements contained in these spherules support the proposal that they originate from extraterrestrial substances. Some useful chemical criteria for identifying the sources of silicate, magnetic and glass spherules are put forward. |
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