Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313..808w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 313, Feb. 15, 1987, p. 808-812.
Astronomy and Astrophysics
Astrophysics
15
Absorption Cross Sections, Molybdenum Isotopes, Neutrons, Nuclear Fusion, Red Giant Stars, Stellar Composition, Technetium Isotopes, Abundance, Asymptotic Giant Branch Stars, Late Stars, Metallicity
Scientific paper
This paper presents the Maxwellian-averaged neutron capture cross sections for Tc-99 and Mo-95, Mo-96, Mo-97, and Mo-98. An extensive temperature range (5-100 keV) is included to encompass the model calculations for ongoing s-process nucleosynthesis in red giant stars where technetium has been observed. At T = 30 keV, the most often chosen temperature for the s-process, the authors find 782 + or - 39 mbarn for Tc-99, 292 + or - 2 mbarn for Mo-95, 112 + or - 6 mbarn for Mo-96, 339 + or - 2 mbarn for Mo-97, and 99 + or - 5 mbarn for Mo-98. These results are used to estimate the duration of the third dredge-up phase for two thermally pulsing asymptotic giant branch stars for which the technetium-to-molybdenum abundances have been measured.
Macklin Richard L.
Winters Ronald R.
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