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Mostrando ítems 11-20 de 21
Artículo
Level densities of transitional Sm nuclei
(American Physical Society, 2005-06-01)
Experimentally determined level densities of the transitional isotopes 148, 149, 150, 152Sm at excitation energies below and around the neutron binding energy are compared with microcanonical calculations based on a Monte ...
Artículo
Neutron capture cross section of 90Zr: Bottleneck in the s-process reaction flow
(The American Physical Society, 2008)
The neutron capture cross sections of the Zr isotopes have important implications in nuclear astrophysics and for reactor design. The small cross section of the neutron magic nucleus 90Zr, which accounts for more than 50% ...
Artículo
Measurement of the 151 Sm( n ,γ ) cross section from 0.6 eV to 1 MeV via the neutron time-of-flight technique at the CERN n TOF facility
(American Physical Society, 2006-03-17)
The 151Sm(n, γ) cross section was measured with the time-of-flight technique from 0.6 eV up to 1 MeV relative to the Au standard with an overall uncertainty of typically 6%. Neutrons were produced by spallation at the ...
Artículo
Pygmy resonances in artificial nuclei far-infrared absorption by electron-hole droplets
(World Scientific Publishing Co. Pte Ltd, 2001-01-30)
The structure of E1 resonances has been examined in a microscopic random phase approximation calculation for neutral, symmetric, closed shell and electron-hole systems in a quantum dot. The number of electron-hole pairs, ...
Artículo
Neutron capture cross section of 232 Th measured at the n TOF facility at CERN in the unresolved resonance region up to 1 MeV
(American Physical Society, 2006-06-07)
We have measured the neutron capture reaction yield of 232Th at the neutron time-of-flight facility n TOF at CERN in the energy range from 1 eV to 1 MeV. The average capture cross section has been extracted in the energy ...
Artículo
Measurement of the neutron capture cross section of the s -only isotope 204 Pb from 1 eV to 440 keV
(American Physical Society, 2007)
The neutron capture cross section of 204Pb has been measured at the CERN n TOF installation with high resolution in the energy range from 1 eV to 440 keV. An R-matrix analysis of the resolved resonance region, between 1 ...
Tesis Doctoral
Artículo
Angular distributions of protons scattered by 40 Ar nuclei with excitation of the 2 + (1.46 MeV) and 3 − (3.68 MeV) collective levels for incident energies of 25.1, 32.5, and 40.7 MeV
(The American Physical Society, 2007)
Elastic and inelastic scattering of unpolarized and polarized protons by 40Ar nuclei for incident energies between 20 and 50 MeV has been studied by reanalyzing experimental scattering spectra for the 2+(1.46 MeV) and ...
Artículo
High-accuracy U233 (n,f) cross-section measurement at the white-neutron source n_TOF from near-thermal to 1 MeV neutron energy
(The American Physical Society, 2009)
The 233U(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 ∼30 meV to 1 MeV neutron energy. The ...
Artículo
Analytical expressions for the dispersive contributions to the nucleon-nucleus optical potential
(American Physical Society, 2003-06-01)
Analytical solutions of dispersion relations in the nucleon-nucleus optical model have been found for both volume and surface potentials. For the energy dependence a standard Brown-Rho function has been assumed for both ...