Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...392..277n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 392, no. 1, June 10, 1992, p. 277-283. Research supported by Alexander von
Astronomy and Astrophysics
Astrophysics
27
Nuclear Astrophysics, Nuclear Fusion, Tantalum Isotopes, Abundance, Helium, Photoexcitation, Stellar Physics, Supernovae
Scientific paper
A quantified discussion of a possible s-process origin of Ta-180m is presented. The required input data were improved in two directions. By photoexcitation experiments it was found that the decay of Ta-180m is not affected at typical s-process temperatures. The stellar (n, gamma)-rates for Ta-179 and Ta-180m were calculated with a refined statistical model approach. The results show that the Ta-180m abundance yields a lower or an upper limit for the temperature at the s-process site, depending on whether it is produced in stellar helium burning or in supernovae.
Kaeppeler Franz
Nemeth Zs.
Reffo G.
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