Sensitivity of astrophysical reaction rates to nuclear uncertainties

Abstract

Sensitivities of nuclear reaction rates to a variation of nuclear properties are studied. Target nuclei range from proton- to neutron-dripline for 10<=Z<=83. Reactions considered are nucleon- and alpha-induced reactions mediated by the strong interaction. The contribution of reactions proceeding on the target ground state to the total stellar rate is also given. General dependences on various input quantities are discussed. Additionally, sensitivities of laboratory cross sections of nucleon-, alpha-, and gamma-induced reactions are shown, allowing to estimate the impact of cross section measurements. Finally, recommended procedures to explore and improve reaction rate uncertainties using the present sensitivity data are outlined.

53 pages, 25 figures, 7 tables; minor revisions, accepted for publication in Ap. J. Suppl.; additional datafiles are also available at http://download.nucastro.org/astro/sensitivity/

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