Parametric study of pulsed neutron source models for the s-process

Details Parametric study of pulsed neutron source models for the s-process Parametric study of pulsed neutron source models for the s-process

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...309..633h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 309, Oct. 15, 1986, p. 633-652.

Physics

65

Giant Stars, Neutrons, Nuclear Fusion, Pulsed Radiation, Stellar Physics, Abundance, Asymptotic Giant Branch Stars, Solar System, Stellar Models, Temperature Dependence

Scientific paper

Models for the s-process which produce an exponential distribution of neutron exposures via sequential irradiations and dredge-up are studied to determine which conditions best characterize the solar system sigma N curve. Models for thermal pulses in asymptotic giant branch (AGB) stars and also a schematic model in which the temperature and neutron density are taken at constant average values during the pulses are considered. It is found that stellar models for thermal pulses in AGB stars do not give a good fit to the solar system sigma N curve even though they predict about the correct neutron exposure. A much better fit is obtained by optimizing the neutron density and temperature in the schematic model.

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