Resonance neutron capture by argon-40

Details Resonance neutron capture by argon-40 Resonance neutron capture by argon-40

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...216..109m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 216, no. 1-2, June 1989, p. 109-112.

Astronomy and Astrophysics

Astrophysics

2

Absorption Cross Sections, Argon Isotopes, Neutrons, Nuclear Fusion, Maxwell-Boltzmann Density Function, Potassium 40, Radioactive Age Determination, Stellar Composition, Stellar Interiors

Scientific paper

Neutron capture by Ar-40 at resonances up to 150 keV has been measured and parameterized using the single-level Breit-Wigner formula. Velocity weighted Maxwellian averaged capture cross sections are presented for use in stellar nucleosynthesis calculations for stellar temperatures from kT = 5 to 60 keV. The results are almost constant above kT = 10 keV because most of the resonances lie at higher energies. At the conventional s-process temperature kT = 30 keV, the Maxwellian averaged capture cross section found is 2.79 + or - 0.15 mb.

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