Barium from a mini r-process in supernovae

Details Barium from a mini r-process in supernovae Barium from a mini r-process in supernovae

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...267..747h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 267, April 15, 1983, p. 747-756.

Astronomy and Astrophysics

Astrophysics

5

Abundance, Barium Isotopes, Carbonaceous Chondrites, Meteoritic Composition, Nuclear Fusion, Supernovae, Isotopic Enrichment, Neodymium Isotopes, Neutron Distribution, Neutron Emission, Nuclear Capture, Nuclear Isobars, Radioactive Decay, Samarium Isotopes, Stellar Envelopes, Xenon Isotopes

Scientific paper

McCulloch and Wasserburg (1978) have reported nonlinear isotopic anomalies in barium for two Ca-Al-rich inclusions of the Allende carbonaceous chondrite, known as EK-1-4-1 and C-1. In an attempt to account for these anomalies, it has been proposed that Ba from an r-process of nucleosynthesis, containing Ba-135 and Ba-137, was injected into the primeval color system but was not totally homogenized. Questions arise in connection with the relations of Xe isotopes in carbonaceous chondrites. This has prompted Heymann and Dziczkaniec (1979, 1980, 1981) to study the formation of r-Xe, r-Kr, and r-Te by the mini r-process which is thought to occur in the O, Ne-rich shells of Type II supernovae. Lee et al. (1979) have studied the formation of r-Ba, r-Nd, and r-Sm by the same process. Certain differences regarding the approaches used by Lee et al. and by Heymann and Dziczkaniec make it necessary to restudy the work of Lee et al. Attention is given to the survival probabilities of nuclear species of interest, taking into accounts the elements Cs, Ba, I, and Xe.

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