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Towards a parity-dependent level density for astrophysics
(2005-10)
Astrophysical reaction rates are sensitive to the parity distribution at low excitation energies. We combine a formula for the energy-dependent parity distribution with a microscopic-macroscopic nuclear level density. This ...
Parity-dependence in the nuclear level density
(2005-07-25)
Astrophysical reaction rates are sensitive to the parity distribution at low excitation energies. We combine a formula for the energy-dependent parity distribution with a microscopic-macroscopic nuclear level density. This ...
Measurement of the Sm-151(n,gamma)Sm-152 cross section at n_TOF
(2005-07-25)
The Sm-151(n,gamma) Sm-152 cross section, which is important for the interpretation of the Sm-151 branching as an s-process thermometer, was measured from 1 eV up to 1 MeV at the innovative n-TOF facility at CERN. Based ...
A comprehensive study of the Cd-106(alpha, gamma)Sn-110 reaction at energies relevant to the p-process
(2005-07-25)
In order to test the reliability of reaction rate calculations in the framework of the Hauser-Feshbach statistical model, the cross sections of Cd-106(alpha,gamma)Sn-110 radiative capture reaction were determined in the ...
The (n,gamma) cross sections of the p-process nuclei Se-74 and Sr-84 at kT=25 keV
(2005-07-25)
The formation of the isotopes on the proton-rich side of the valley of stability cannot be ascribed to neutron capture reactions in the r- or s-processes. These nuclei are produced in the p process, which presumably takes ...
Astrophysical conditions for an r-process in the high-entropy wind scenario of type II supernovae
(2005-07-25)
Within a full dynamical parameter study including freezeout effects, we have determined the astrophysical conditions for an r-process in the so-called "neutrino-wind" scenario of core-collapse type II supernovae (SNII). ...
Neutron captures in the r-process : Do we know them and does it make any difference?
(2005-07-25)
Nucleosynthesis of elements beyond the iron peak requires reactions with neutrons due to the high Coulomb barriers which prevent charged particle reactions. Approximately half of the intermediate and heavy elements are ...
Measurements of the 90,91,92,94,96Zr(n, gamma) cross-sections at n_TOF
(2005-07-25)
Neutron capture cross sections of the 90,91,91,94,96Zr have been measured over the energy range from 1 eV to 1 MeV at the spallation neutron facility n-TOF at CERN in 2003. The innovative features of the neutron beam, in ...
Neutron capture cross section measurements for nuclear astrophysics at CERN n_TOF
(2005-07-25)
A series of neutron capture cross section measurements of interest to nuclear astrophysics have been recently performed at n-TOF, the neutron spallation source operating at CERN. The low repetition frequency of the proton ...
Reaction rate sensitivity of the gamma-process path
(2005-07-25)
The location of the (gamma,p)/(gamma,n) and (gamma,alpha)/(gamma,n) line at gamma-process temperatures is discussed, using recently published reaction rates based on global Hauser-Feshbach calculations. The results can ...