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
Rok vydání:	1997
Předmět:	Physics Murchison meteorite Stars Solar System chemistry.chemical_compound chemistry Nucleosynthesis Silicon carbide General Physics and Astronomy Astronomy Asymptotic giant branch s-process
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
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0f8c8101026e48bcb8579fff80bad755 https://doi.org/10.1103/physrevlett.78.2704 Zobrazit plný text záznamu