Evolution and Nucleosynthesis of Massive Stars and Related Nuclear Uncertainties

Abstract

Properties of atomic nuclei important for the prediction of astrophysical reaction rates are reviewed. In the first part, a recent simulation of evolution and nucleosynthesis of stars between 15 and 25 solar masses is presented. This study is used to illustrate the required nuclear input as well as to give examples of the sensitivity to certain rates. The second part focusses on the prediction of nuclear rates in the statistical model (Hauser-Feshbach) and direct capture (DWBA). Some of the important ingredients are addressed. Discussed in more detail are approaches to predict level densities, parity distributions, and optical alpha+nucleus potentials.

Invited talk at 17th Int. Nucl. Phys. Conf. of the EPS "Nuclear Physics in Astrophysics", Debrecen, Hungary, 2002 (new version: fixed typo in alpha potential parameters; note: the parameters are incorrect in the NPA paper)

References in corpus (10)

• Nucleosynthesis in Massive Stars With Improved Nuclear and Stellar Physics
• Astrophysical Reaction Rates From Statistical Model Calculations
• Shell-model calculations of stellar weak interaction rates: II. Weak rates for nuclei in the mass range A=45-65 in supernovae environment
• Tables of Nuclear Cross Sections and Reaction Rates: an Addendum to the Paper "Astrophysical Reaction Rates from Statistical Model Calculations"
• Particle-Number Reprojection in the Shell Model Monte Carlo Method: Application to Nuclear Level Densities
• alpha-nucleus potentials for the neutron-deficient p nuclei
• Parity Dependence of Nuclear Level Densities
• Capture of alpha Particles by Isospin-Symmetric Nuclei
• ${}^{92}$Mo($\alpha ,\alpha$)${}^{92}$Mo scattering,the ${}^{92}$Mo--$\alpha$ optical potential, and the ${}^{96}$Ru($\gamma ,\alpha$)${}^{92}$Mo reaction rate at astrophysically relevant energies
• Direct neutron capture cross sections of 62Ni in the s-process energy range

Cited by in corpus (19)

• Branchings in the gamma-process path revisited
• Alpha-induced cross sections of 106Cd for the astrophysical p-process
• Complementary optical-potential analysis of alpha-particle elastic scattering and induced reactions at low energies
• Odd p isotope 113In: Measurement of alpha-induced reactions
• Determination of 141Pr(alpha,n)144Pm cross sections at energies of relevance for the astrophysical p-process using the gamma-gamma coincidence method
• Elastic alpha scattering experiments and the alpha-nucleus optical potential at low energies
• Alpha-induced reaction cross section measurements on 151Eu for the astrophysical gamma-process
• Determining reaction cross sections via characteristic X-ray detection: α-induced reactions on 169Tm for the astrophysical γ -process
• Cross section measurements of $\alpha$-induced reactions on ${}^{92,94}$Mo and ${}^{112}$Sn for $p$-process studies
• Elastic alpha-scattering of 112Sn and 124Sn at astrophysically relevant energies
• Cross section predictions for hydrostatic and explosive burning
• Resonance analysis of ${}^{147}$Sm(n,alpha) cross sections: Comparison to optical model calculations and indications of non-statistical effects
• Astrophysical analysis of the measurement of (alpha,gamma) and (alpha,n) cross sections of 169Tm
• Spin measurements for 147Sm+n resonances: Further evidence for non-statistical effects
• Total reaction cross sections from ${}^{141}$141Pr($\alpha$,$\alpha$)${}^{141}$Pr elastic scattering and $\alpha$-induced reaction cross sections at low energies
• Total reaction cross section ${\sigma }_{\mathrm{reac}}$ of $\alpha$-induced reactions from elastic scattering: the example ${}^{140}$Ce($\alpha$,$\alpha$)${}^{140}$Ce
• Alpha-induced reactions for the astrophysical p-process: the case of 151Eu
• Analysis of alpha-induced reactions on ${}^{151}$Eu below the Coulomb barrier
• Origin of the p-Nuclei in Explosive Nucleosynthesis