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Now showing items 11-20 of 20
Resonance neutron-capture cross sections of stable magnesium isotopes and their astrophysical implications
(2012-04-20)
We have measured the neutron capture cross sections of the stable magnesium isotopes Mg-24,Mg-25,Mg-26 in the energy range of interest to the s process using the neutron time-of-flight facility n_TOF at CERN. Capture events ...
Neutron-induced fission cross section of Cm-245 : New results from data taken at the time-of-flight facility n_TOF
(2012-03-29)
The neutron-induced fission cross section of Cm-245 was measured at n_TOF in a wide energy range and with high resolution. The energy dependence, measured in a single measurement from 30 meV to 1 MeV neutron energy, has ...
Simultaneous measurement of neutron-induced capture and fission reactions at CERN
(2012-03)
The measurement of the capture cross-section of fissile elements, of utmost importance for the design of innovative nuclear reactors and the management of nuclear waste, faces particular difficulties related to the.-ray ...
Investigation of alpha-induced reactions on Ba-130 and Ba-132 and their importance for the synthesis of heavy p nuclei
(2012-02-17)
Captures of a particles on the proton-richest barium isotope, Ba-130, have been studied in order to provide cross-section data for the modeling of the astrophysical gamma process. The cross sections of the Ba-130(alpha,g ...
Reaction Rate Uncertainties and the nu p-Process
(American Institute of Physics (AIP), 2012)
Current hydrodynamical simulations of core collapse supernovae find proton-rich early ejecta. At the same time, the models fail to eject neutron-rich matter, thus leaving the origin of the main r-process elements unsolved. ...
Present Status and Future Programs of the n_TOF Experiment
(EDP Sciences, 2012)
The neutron time-of-flight facility n_TOF at CERN, Switzerland, operational since 2001, delivers neutrons using the Proton Synchrotron (PS) 20 GeV/c proton beam impinging on a lead spallation target. The facility combines ...
Neutron induced reactions for the s process, and the case of Fe and Ni isotopes
(2012)
Neutron capture cross sections are the key nuclear physics input to understand nucleosynthesis of the slow neutron capture process (s process). At the neutron time of flight facility n-TOF at CERN neutron capture cross ...
Investigation of alpha-nuclear potential families from elastic scattering experiments
(IOP Publishing Ltd., 2012)
In this work we present the continuation of the reported analysis [1] of the experimentally measured angular distributions of the reaction Cd-106(alpha, alpha)Cd-106 at several different energies around the Coulomb barrier. ...
Proton-rich nucleosynthesis and nuclear physics
(American Institute of Physics (AIP), 2012)
Although the detailed conditions for explosive nucleosynthesis are derived from astrophysical modeling, nuclear physics determines fundamental patterns in abundance yields, not only for equilibrium processes. Focussing on ...
A CVD diamond detector for (n,alpha) cross section measurements
(SISSA, 2012-01)
In astrophysics, the determination of the optical alpha-nucleus potential for low alpha-particle energies, crucial in understanding the origin of the stable isotopes, has turned out to be a challenge. Theory still cannot ...