The path to improved reaction rates for astrophysics
This review focuses on nuclear reactions in astrophysics and, more specifically, on reactions with light ions (nucleons and alpha particles) proceeding via the strong interaction. It is intended to present the basic definitions essential for studies in nuclear astrophysics, to point out the differences between nuclear reactions taking place in stars and in a terrestrial laboratory, and to illustrate some of the challenges to be faced in theoretical and experimental studies of those reactions. The discussion revolves around the relevant quantities for astrophysics, which are the astrophysical reaction rates. The sensitivity of the reaction rates to the uncertainties in the prediction of various nuclear properties is explored and some guidelines for experimentalists are also provided
Published inInternational Journal of Modern Physics E - Nuclear Physics
RelationsSchool of Physics, Astronomy and Mathematics
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Rauscher, T. (American Institute of Physics, 2010)The relevant energy ranges for stellar nuclear reactions are introduced. Low-energy compound and direct reactions are discussed. Stellar modifications of the cross sections are presented. Implications for experiments are outlined.
Two effects relevant for the study of astrophysical reaction rates : gamma transitions in capture reactions and Coulomb suppression of the stellar enhancement Rauscher, T. (American Institute of Physics, 2009)Nucleosynthesis processes involve reactions on several thousand nuclei, both close to and far off stability. The preparation of reaction rates to be used in astrophysical investigations requires experimental and theoretical ...
Determination of (n,gamma) reaction rates at s-process branching points via their inverse reactions Sonnabend, K.; Mengoni, A.; Mohr, P.; Rauscher, T.; Vogt, K.; Zilges, A. (2003-05-19)We present our method to determine the (n,gamma) reaction rates of s-process branching point nuclei using data of the inverse (gamma,n) reaction. As an example, we selected Zr-95. The analysis of the data of the reaction ...