Rates for some reactions involving Ca-42 and Ca-44

Details Rates for some reactions involving Ca-42 and Ca-44 Rates for some reactions involving Ca-42 and Ca-44

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apjs...42..475c&link_type=abstract

Astrophysical Journal Supplement Series, vol. 42, Mar. 1980, p. 475-479. Research supported by the Natural Sciences and Enginee

Astronomy and Astrophysics

Astrophysics

2

Calcium Isotopes, Ground State, Nuclear Fusion, Reaction Kinetics, Stellar Structure, Abundance, Scandium Isotopes, Stellar Temperature, Titanium Isotopes

Scientific paper

Ground state reaction rates were deduced from recent cross section measurements for the Ca-42(alpha, n), Ti-45, Ca-42(p, gamma)Sc-43, and Ca-44(p, n)Sc44 reactions. A comparison of these rates with those calculated from a statistical model of nuclear reactions (Woosley et al., 1975) shows good agreement for the first two, but the Ca-44(p, n) rate is more than a factor of 2 less than the theoretical prediction. Stellar reaction rates were derived from the ground state rates, and the role of these reactions in the approach to quasi-equilibrium during explosive silicon burning is discussed.

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