NEW ND-142.144 (N,GAMMA) CROSS-SECTIONS AND THE S-PROCESS ORIGIN OF THE ND ANOMALIES IN PRESOLAR METEORIC SILICON-CARBIDE GRAINS

Authors
GUBER KH SPENCER RR KOEHLER PE WINTERS RR
Citation
Kh. Guber et al., NEW ND-142.144 (N,GAMMA) CROSS-SECTIONS AND THE S-PROCESS ORIGIN OF THE ND ANOMALIES IN PRESOLAR METEORIC SILICON-CARBIDE GRAINS, Physical review letters, 78(14), 1997, pp. 2704-2707
Citations number
28
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
78
Issue
14
Year of publication
1997
Pages
2704 - 2707
Database
ISI
SICI code
0031-9007(1997)78:14<2704:NN(CAT>2.0.ZU;2-F
Abstract
We have made improved measurements of the Nd-142.144(n, gamma) cross s ections and investigated the s-process nucleosynthesis in the Ce-Nd-Sm region. Recently discovered anomalies of the Nd isotopes in silicon c arbide grains from the Murchison meteorite have been interpreted in te rms of pure s-process material from an AGB star. With previous cross s ection data the s-process origin could not be confirmed, whereas our n ew data convincingly support the interpretation that these isotopic an omalies were carried into the early solar system inside carbon dust pa rticles that condensed in outflowing winds of presolar AGB stars.