10Be and 26Al Concentrations in Bulk Material and Mineral Separates of Antarctic and Non-Antarctic Achondrites

Details 10Be and 26Al Concentrations in Bulk Material and Mineral Separates of Antarctic and Non-Antarctic Achondrites 10Be and 26Al Concentrations in Bulk Material and Mineral Separates of Antarctic and Non-Antarctic Achondrites

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993metic..28r.361h&link_type=abstract

Meteoritics, vol. 28, no. 3, volume 28, page 361

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Achondrites, Antarctic, Non-Antarctic, Elemental Production Rates

Scientific paper

The investigation of radionuclide concentrations in bulk material and mineral separates of achondrites allow the study of the irradiation and collision history of meteoroids and their parent body as well as the determination of elemental production rates. Numerous Antarctic and non-Antarctic achondrites of types howardite, monomict, and polymict eucrite, and diogenite were mineralogically investigated. Bulk material and mineral separates, e.g., plagioclase, pyroxene, basalt, and impact- fusion-breccia were taken and the chemical composition of each sample was analyzed. In these specimen ^10Be- and ^26Al- concentrations were determined by means of radiochemical separation and accelerator mass spectrometry. The experimental data are interpreted by model calculations [1] based on spectra of primary and secondary particles derived by Monte Carlo techniques and on experimental and theoretical thin-target cross sections of the underlying nuclear reactions. The results will be presented and discussed. Acknowledgement: This work was partially supported by the Bundesminister fur Forschung und Technologie. Reference: [1] Michel R. et al. (1991) Meteoritics, 26, 221-242.

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