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High-accuracy U-233(n, f) cross-section measurement at the white-neutron source n_TOF from near-thermal to 1 MeV neutron energy
(2009-10)
The U-233(n, f) cross section has been measured at the white neutron source n_TOF in a wide energy range with a dedicated fission ionization chamber. We report here the results from similar to 30 meV to 1 MeV neutron energy. ...
The n_TOF Total Absorption Calorimeter for neutron capture measurements at CERN
(2009-09-21)
The n_TOF Collaboration has built and commissioned a high-performance detector for (n, gamma) measurements called the Total Absorption Calorimeter (TAC). The TAC was especially designed for measuring neutron capture ...
Suppression of the stellar enhancement factor and the reaction Rb-85(p, n)Sr-85
(2009-09)
It is shown that a Coulomb suppression of the stellar enhancement factor occurs in many endothermic reactions at and far from stability. Contrary to common assumptions, reaction measurements for astrophysics with minimal ...
Chemistry of heavy elements in the Dark Ages
(2009-08)
Context. Primordial molecules were formed during the Dark Ages, i.e. the time between recombination and reionization in the early Universe. They were the constituents of the first proto-stellar clouds. Standard Big Bang ...
Odd p isotope In-113 : Measurement of alpha-induced reactions
(2009-06)
One of the few p nuclei with an odd number of protons is In-113. Reaction cross sections of In-113(alpha,gamma)Sb-117 and In-113(alpha,n)Sb-116 have been measured with the activation method at center-of-mass energies between ...
Low-lying dipole response in the relativistic quasiparticle time blocking approximation and its influence on neutron capture cross sections
(2009-05-15)
We have computed dipole strength distributions for nickel and tin isotopes within the Relativistic Quasiparticle Time Blocking Approximation (RQTBA). These calculations provide a good description of data, including the ...
Impact of uncertainties in reaction Q values on nucleosynthesis in type I x-ray bursts
(2009-04)
Nucleosynthesis in type I X-ray bursts may involve up to several thousand nuclear processes. The majority of these processes have only been determined theoretically due to the lack of sufficient experimental information. ...
Two effects relevant for the study of astrophysical reaction rates : gamma transitions in capture reactions and Coulomb suppression of the stellar enhancement
(American Institute of Physics (AIP), 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 ...
n_TOF Experiment: Past, Present And Future
(American Institute of Physics (AIP), 2009)
The neutron Time-of-Flight facility at CERN was built to measure the neutron capture and fission cross sections. A short description of the facility, the detectors and the data analysis techniques will be illustrated. A ...