The S-process nucleosynthesis of zirconium in S-stars

Details The S-process nucleosynthesis of zirconium in S-stars The S-process nucleosynthesis of zirconium in S-stars

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...133..317b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 133, no. 2, April 1984, p. 317-319.

Astronomy and Astrophysics

Astrophysics

8

Neutron Cross Sections, Nuclear Fusion, S Stars, Stellar Models, Zirconium Isotopes, Abundance, Metallic Stars, Red Giant Stars

Scientific paper

The abundances of 90,91,92,93,94Zr in the S stars R Cyg, V Cnc, and R Gem as reported by Zook (1978) are studied using the model of an exponential distribution of neutron exposures. The characteristic quantity, the average time integrated neutron flux τ0, was determined to be (0.075+0.083-0.029) 1027 neutrons per cm2. The neutron density was estimated to be smaller than ≡108 neutrons per cm3 due to the absence of any 96Zr abundance. Implications for the pulsed s-process model of Truran and Iben (1977) are discussed.

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