Crucial inputs to nucleosynthesis calculations
نویسنده
چکیده
The first part of the paper discusses nuclear properties relevant to predict compound reactions. The second part addresses direct reactions with special emphasis on direct neutron capture.
منابع مشابه
Primordial Nucleosynthesis with CMB Inputs: Probing the Early Universe and Light Element Astrophysics
Cosmic microwave background (CMB) determinations of the baryon-to-photon ratio η ∝ Ωbaryonh 2 will remove the last free parameter from (standard) big bang nucleosynthesis (BBN) calculations. This will make BBN a much sharper probe of early universe physics, for example, greatly refining the BBN measurement of the effective number of light neutrino species, Nν,eff . We show how the CMB can impro...
متن کاملun 2 00 4 Supernova Neutrino - Nucleus Physics and the r - process
This talk reviews three inputs important to neutrino-induced nu-cleosynthesis in a supernova: 1) " standard " properties of the super-nova neutrino flux, 2) effects of phenomena like neutrino oscillations on that flux, and 3) nuclear structure issues in estimating cross sections for neutrino-nucleus interactions. The resulting possibilities for neutrino-induced nucleosynthesis – or the ν-proces...
متن کاملNucleosynthesis in early supernova winds III: No significant contribution from neutron-rich pockets
Recent nucleosynthesis calculations of Type II supernovae using advanced neutrino transport determine that the early neutrino winds are proton-rich. However, a fraction of the ejecta emitted at the same time is composed of neutron-rich pockets. In this paper we calculate the nucleosynthesis contribution from the neutron-rich pockets in the hot convective bubbles of a core-collapse supernova and...
متن کاملQuark-hadron phase transition, QCD lattice calculations, and inhomogeneous big-bang nucleosynthesis.
We review recent lattice QCD results for the surface tension at the finite temperature quarkhadron phase transition and discuss their implications on the possible scale of inhomogeneities. In the quenched approximation the average distance between nucleating centers is smaller than the diffusion length of a protron, so that inhomogeneities are washed out by the time nucleosynthesis sets in. Con...
متن کاملOn Solar System and Cosmic Rays Nucleosynthesis and Spallation Processes
A brief survey of nuclide abundances in the solar-system and in cosmic rays and of the believed mechanisms of their synthesis is given. The role of spallation processes in nucleosynthesis is discussed. A short review of recent measurements, compilations, calculations, and evaluations of spallation cross sections relevant to nuclear astrophysics is given as well. It is shown that in some past as...
متن کامل