The s-process branching at Sm-151

Details The s-process branching at Sm-151 The s-process branching at Sm-151

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...278..388b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 278, March 1, 1984, p. 388-395.

Physics

15

Branching (Physics), Nuclear Fusion, Radioactive Decay, Samarium Isotopes, Solar Physics, Abundance, Gadolinium Isotopes, Ground State, Neutron Cross Sections

Scientific paper

The s-process branching at Sm-151 is investigated, with emphasis placed on the determination of the capture cross sections, temperature-dependent beta-decay rates of the unstable isotopes, and thermal equilibrium time scale for the ground and the isomeric state in Eu-152. By using the steady flow model of the s-process, a neutron density of (1.3-2.8) x 10 to the 8th per cu cm at a temperature of 3 x 10 to the 8th K and an electron density of 10 to the 27th per cu cm has been obtained. The estimated range of the neutron density is determined by the assumed p-process contribution to the abundance of Gd-152, the key isotope of this branching.

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