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A new CVD diamond mosaic-detector for (n, α) cross-section measurements at the n_TOF experiment at CERN
(2013-12-21)
At the n_TOF experiment at CERN a dedicated single-crystal chemical vapor deposition (sCVD) Diamond Mosaic-Detector has been developed for (n,α) cross-section measurements. The detector, characterized by an excellent time ...
High-accuracy determination of the neutron flux at n_TOF
(2013-12-18)
The neutron flux of the n_TOF facility at CERN was measured, after installation of the new spallation target, with four different systems based on three neutron-converting reactions, which represent accepted cross sections ...
Angular distribution in the neutron-induced fission of actinides
(EDP Sciences, 2013-12-13)
Above 1 MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the ...
Neutron studies for advanced reactors at n-TOF (CERN)
(2013-12)
The neutron time-of-flight facility n-TOF at CERN has been designed to produce cross-section data for neutron induced reactions in the neutron energy range from thermal to GeV. In the first ten years of operation, the ...
High precision 113In(α,α)113In elastic scattering at energies near the Coulomb barrier for the astrophysical γ process
(2013-10-28)
Background: The γ process in supernova explosions is thought to explain the origin of proton-rich isotopes between Se and Hg, the so-called p nuclei. The majority of the reaction rates for γ process reaction network studies ...
Measurement of the 90,92Zr(p,γ)91,93Nb reactions for the nucleosynthesis of elements near A=90
(2013-10-21)
Cross section measurements of the reactions 90,92Zr(p,γ) 91,93Nb were performed using the National Superconducting Cyclotron Laboratory Summing NaI(Tl) detector at the University of Notre Dame. These reactions are part of ...
Suppression of excited-state contributions to stellar reaction rates
(2013-09-09)
It has been shown in previous work [Kiss et al., Phys. Rev. Lett. 101, 191101 (2008); Rauscher et al., Phys. Rev. C 80, 035801 (2009)] that a suppression of the stellar enhancement factor (SEF) occurs in some endothermic ...
Solution of the alpha-potential mystery in the gamma-process and its impact on the Nd/Sm ratio in meteorites
(2013-08-09)
The 146Sm/144Sm ratio in the early solar system has been constrained by Nd/Sm isotope ratios in meteoritic material. Predictions of 146Sm and 144Sm production in the gamma-process in massive stars are at odds with these ...
Silicon carbide grains of type C provide evidence for the production of the unstable isotope Si in supernovae
(2013-07-01)
Carbon-rich grains are observed to condense in the ejecta of recent core-collapse supernovae (SNe) within a year after the explosion. Silicon carbide grains of type X are C-rich grains with isotopic signatures of explosive ...
Constraining the astrophysical origin of the p-nuclei through nuclear physics and meteoritic data
(2013-06-01)
A small number of naturally occurring, proton-rich nuclides (the p-nuclei) cannot be made in the s- and r-processes. Their origin is not well understood. Massive stars can produce p-nuclei through photodisintegration of ...