New142,144Nd(n,γ)Cross Sections and thes-process Origin of the Nd Anomalies in Presolar Meteoric Silicon Carbide Grains
Autor: | Klaus H Guber, R. R. Spencer, P. E. Koehler, R. R. Winters |
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Rok vydání: | 1997 |
Předmět: | |
Zdroj: | Physical Review Letters. 78:2704-2707 |
ISSN: | 1079-7114 0031-9007 |
Popis: | We have made improved measurements of the {sup 142,144}Nd(n,{gamma}) cross sections and investigated the {ital s}-process nucleosynthesis in the Ce-Nd-Sm region. Recently discovered anomalies of the Nd isotopes in silicon carbide grains from the Murchison meteorite have been interpreted in terms of pure {ital s}-process material from an AGB star. With previous cross section data the {ital s}-process origin could not be confirmed, whereas our new data convincingly support the interpretation that these isotopic anomalies were carried into the early solar system inside carbon dust particles that condensed in outflowing winds of presolar AGB stars. {copyright} {ital 1997} {ital The American Physical Society} |
Databáze: | OpenAIRE |
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