Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980metic..15...15h&link_type=abstract
Meteoritics, vol. 15, Mar. 31, 1980, p. 15-24.
Astronomy and Astrophysics
Astrophysics
1
Hot Stars, Nuclear Fusion, Stellar Mass, Stellar Structure, Xenon Isotopes, Abundance, Carbonaceous Chondrites, Fractionation, Meteoritic Composition, Stellar Evolution, Stellar Temperature, Meteorites, Stars, Nucleosynthesis, Fractionation, Xenon, Mass, Theoretical Studies, Anomalies, Formation, Carbonaceous Chondrites, Nuclei, Temperatures, Explosions, Composition, Abundance, Barium, Isotopes, Cerium, Hydrostatics
Scientific paper
The combination of the O-shell theory of Heymann and Dziczkaniec and the supernova theory of Woosley and Howard clearly identifies the astrophysical sites for the formation of the anomalous light Xe component in carbonaceous chondrites. These sites are the O- and Ne-shells, and possibly C-shell of a massive star. Most of the Xe-124 and Xe-126 are formed in the O-shell during hydrostatic core silicon-burning, when a seed of heavy nuclei is exposed to an effective temperature near T9 = 2.0. Xe-128 is formed via Ba-128 in the O-shell, but the amounts appear too small to satisfy the deduced Xe-128/Xe-124 and Xe-128/Xe-126 yield ratios from the chondrites. However, substantial amounts of Xe-128 can be formed in the adjacent Ne- and C-shells during the explosion. The formation of Ba-128 in the O-shell would increase if the (gamma, alpha) photodisintegration rate in Ba-128 is actually smaller than calculated by Woosley and Howard. Lewis et al. have proposed that the anomalous light Xe component is mass-fractionated normal Xe. It is in this sense that the process of stellar nucleosynthesis of the present paper mimicks mass-fractionation.
Dziczkaniec Marlene
Heymann Dieter
No associations
LandOfFree
A process of stellar nucleosynthesis which mimicks mass fractionation in P-xenon does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A process of stellar nucleosynthesis which mimicks mass fractionation in P-xenon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A process of stellar nucleosynthesis which mimicks mass fractionation in P-xenon will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1574683