The 42Ca(α, γ)46Ti and 42Ca(α, p)45Sc cross sections and the mass-45 bottleneck

Details The 42Ca(α, γ)46Ti and 42Ca(α, p)45Sc cross sections and the mass-45 bottleneck The 42Ca(α, γ)46Ti and 42Ca(α, p)45Sc cross sections and the mass-45 bottleneck

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985nupha.443..487m&link_type=abstract

Nuclear Physics A, Volume 443, Issue 3, p. 487-498.

Physics

Nuclear Physics

3

Nuclear Reactions

Scientific paper

The yield of γ-rays from the reaction 42Ca(α, γ)46Ti has been measured as a function of bombarding energy over the range Eα = 3.42-5.62 MeV and from 42Ca(α, pγ)45Sc over the range Eα = 4.06-5.92 MeV, and the yield of protons from the reaction 42Ca(α, p)45Sc has been measured over the range Eα = 4.78-5.92 MeV. Cross sections for all three reactions have been extracted from the data and compared with global statistical-model calculations. The agreement is good. Thermonuclear reaction rates under stellar conditions appropriate for silicon burning are calculated and their significance for the approach to and bridging of the mass-45 bottleneck in the upward flow of nucleosynthesis is discussed.

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