On laboratory studies of grains from outside the Solar System.

Details On laboratory studies of grains from outside the Solar System. On laboratory studies of grains from outside the Solar System.

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998piase.107..379o&link_type=abstract

Proc. Indian Acad. Sci., Earth Planet. Sci., Vol. 107, No. 4, p. 379 - 390

Computer Science

Interstellar Grains: Solar Nebula

Scientific paper

An overview is given of the identified surviving presolar grains in primitive meteorites. Two of these phases are discussed in more detail: (1) Presolar silicon carbide, with special emphasis on heavy element isotopic compositions which trace the slow neutron capture process (s-process) of nucleosynthesis. It is argued that there are problems either with the grain or neutron capture cross section data or with current basic understanding of heavy element nucleosynthesis. (2) Presolar diamonds, where new developments are discussed concerning the origin of the (supernova) xenon-HL component thought to be contained within them. In addition, arguments are presented in favor of diverse carrier phases for the various Xe components observed in diamond separates.

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