Die relativen Produktionsquerschnitte für 3He und 21Ne aus Mg, Si, S und Fe in Steinmeteorite
Open Access
- 1 January 1964
- journal article
- research article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 19 (1) , 88-92
- https://doi.org/10.1515/zna-1964-0116
Abstract
With various mineral separation methods, including our newly developed technique of specific solvents, we succeeded in separating very pure fractions of metallic iron, troilite, olivine and pyroxene from the Holbrook meteorite. Helium and neon were extracted from those minerals. The measurements allowed a determination of the relativ production rates of 3He and the neon isotopes by cosmic rays in iron, sulphur, magnesium and silicon. The results enable us to calculate the relative production rates of these isotopes in all kinds of meteorites whatever their chemical composition. The ratio of the relative production rates of 21Ne from Mg and Si is 1.8 ± 0.4. Therefore, we can conclude that the variations of the 3He/21Ne ratio in stone meteorites can not be explained by variations in their chemical composition, at least not for the normal chondrites.Keywords
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