Buscar
Mostrando ítems 21-30 de 54
Artículo
Dispersive spherical optical model of neutron scattering from 27 Al up to 250 MeV
(American Physical Society, 2002-03-01)
A spherical optical model potential (OMP) containing a dispersive term is used to fit the available experimental database of s(u) and sT for n127Al covering the energy range 0.1–250 MeV using relativistickinematics ...
Artículo
New measurement of neutron capture resonances in 209 Bi
(American Physical Society, 2006-08-29)
The neutron capture cross section of 209 Bi has been measured at the CERN n TOF facility by employing the pulse-height-weighting technique. Improvements over previous measurements are mainly because of an optimized ...
Artículo
Approximate Lane consistency of the dispersive coupled-channels potential for actinides
(The American Physical Society, 2007)
A previously derived dispersive coupled-channels optical model potential for nucleon scattering on 232Th and 238U nuclei [Capote, Soukhovitskii, Quesade, and Chiba, Phys. Rev. C 72, 064610 (2005)] has been tested against ...
Artículo
High accuracy 235 U(n,f) data in the resonance energy region
(EDP sciences, 2016)
The 235U neutron-induced cross section is widely used as reference cross section for measuring other fission cross sections, but in the resonance region it is not considered as an IAEA standard because of the scarce ...
Artículo
Saturation of coupling of collective levels in optical model calculations of even-even actinides
(EDP Sciences, 2017)
Saturation of the coupling-scheme is studied in dispersive optical model calculations of nucleon induced reactions on 238U target. Recently derived potential that is based on a soft-rotator-model (SRM) description of the ...
Artículo
Measurement of the radiative neutron capture cross section of 206 Pb and its astrophysical implications
(The American Physical Society, 2007)
The (n,γ) cross section of 206Pb has been measured at the CERN n_TOF facility with high resolution in the energy range from 1 eV to 620 keV by using two optimized 6C6D detectors. In the investigated energy interval about ...
Artículo
Measurement and analysis of the 243 Am neutron capture cross section at the n_TOF facility at CERN
(American Physical Society, 2014)
Background: The design of new nuclear reactors and transmutation devices requires to reduce the present neutron cross section uncertainties of minor actinides. Purpose: Improvement of the Am243(n,γ) cross section uncertainty. ...
Artículo
Discontinuities in the level density of small quantum dots under strong magnetic fields
(American Physical Society, 2002)
Exact diagonalization studies of the level density in a six-electron quantum dot under magnetic fields around 7 T ("filling factor" around 1/2) are reported. In any spin-polarization channel, two regimes are visible in the ...
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 physics of the Re/Os clock. I. Measurement of the (n, γ) cross sections of 186, 187, 188 Os at the CERN n_TOF facility
(The American Physical Society, 2010)
The precise determination of the neutron capture cross sections of 186Os and 187Os is important to define the s-process abundance of 187Os at the formation of the solar system. This quantity can be used to evaluate the ...