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Toward complete isotopic analysis of individual presolar silicon carbide grains: C, N, Si, Sr, Zr, Mo, and Ba in single grains of type X.

DE2001768572

Publication Date	2000
Personal Author	Pellin, M. J.; Calaway, W. F.; Davis, A. M.; Lewis, R. S.; Amari, S.
Page Count	5
Abstract	Presolar silicon carbide grains form in a variety of types of stars, including asymptotic giant branch red giant stars and supernovae. The dominant mechanisms of heavy element nucleosynthesis, the s-process and r-process, are thought to occur mainly in AGB stars and supernovae, respectively (1). We have previously reported that mainstream SiC grains have strong enrichments in the s-process isotopes of Sr, Zr and Mo (2-4) and initial results for X-type SiC grains showing enrichments in the r-process isotopes of Mo(5). We report here the first measurements of Zr, Sr, and Ba isotopes along with expanded studies of Mo in individual X-type SiC grains, which have previously been identified as having formed from supernova ejects.
Keywords	Silicon carbides Supernovae Nucleosynthesis R process Red giant stars S process Stars Interstellar grains
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Argonne National Lab., IL.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200125
Contract Number	W-31-109-ENG-38

Toward complete isotopic analysis of individual presolar silicon carbide grains: C, N, Si, Sr, Zr, Mo, and Ba in single grains of type X.

Toward complete isotopic analysis of individual presolar silicon carbide grains: C, N, Si, Sr, Zr, Mo, and Ba in single grains of type X.
DE2001768572

Publication Date	2000
Personal Author	Pellin, M. J.; Calaway, W. F.; Davis, A. M.; Lewis, R. S.; Amari, S.
Page Count	5
Abstract	Presolar silicon carbide grains form in a variety of types of stars, including asymptotic giant branch red giant stars and supernovae. The dominant mechanisms of heavy element nucleosynthesis, the s-process and r-process, are thought to occur mainly in AGB stars and supernovae, respectively (1). We have previously reported that mainstream SiC grains have strong enrichments in the s-process isotopes of Sr, Zr and Mo (2-4) and initial results for X-type SiC grains showing enrichments in the r-process isotopes of Mo(5). We report here the first measurements of Zr, Sr, and Ba isotopes along with expanded studies of Mo in individual X-type SiC grains, which have previously been identified as having formed from supernova ejects.
Keywords	Silicon carbides Supernovae Nucleosynthesis R process Red giant stars S process Stars Interstellar grains
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Argonne National Lab., IL.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200125
Contract Number	W-31-109-ENG-38