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Now showing items 21-30 of 179
Fe-60 in the cosmic blender
(2008-07)
Measurement of the (90,91,92,93,94,96)Zr(n,gamma) and (139)La(n,gamma) cross sections at n_TOF
(EDP Sciences, 2008-06)
Neutron capture cross sections of Zr and La isotopes have important implications in the field of nuclear astrophysics as well as in the nuclear technology. In particular the Zr isotopes play a key role for the determination ...
Neutron capture cross section of (90)Zr : Bottleneck in the s-process reaction flow
(2008-03)
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 (90)Zr, which accounts for more than ...
176Lu/176Hf : A sensitive test of s-process temperature and neutron density in AGB stars
(2008-01-20)
The s-process branching at A (176) has been analyzed on the basis of significantly improved experimental cross sections. This work reports on activation measurements of the partial (n, gamma) cross section of Lu-176 feeding ...
Investigation of proton-induced reactions on Germanium isotopes
(2008-01)
The cross sections of the (70)Ge(p,gamma)(71)As and (76)Ge(p, n)(76)As reactions have been measured in the energy range relevant for the astrophysical p-process (1.6-4.4 MeV). The proton beam was provided by the Van de ...
Recent experiments at ORELA and LANSCE, and their impact on compound nuclear models
(American Institute of Physics, 2008)
We present results from two recent sets of experiments to demonstrate the continuing impact of neutron time-of-flight data on the underlying assumptions and parameters of compound nuclear models.
Nuclear physics for the Re/Os clock
(2008-01)
Dating the age of the universe by the beta-decay of (187)Re (t(1/2) = 41.2 Gyr) requires the accurate assessment of the s-process reaction flow. The daughter nucleus (187)Os as well as its immediate s-only neighbor (186)Os ...
The measurement of the (206)Pb(n,gamma) cross section and stellar implications
(2008-01)
The neutron capture cross section of (206)Pb has been measured at the CERN n_TOF spectrometer using a setup of two C(6)D(6) detectors. In the energy interval from 1 eV to 600 keV the cross section is dominated by resonances, ...
Recent results at n_TOF and future perspectives
(American Institute of Physics, 2008)
The neutron Time-of-Flight facility at CERN has been used for a series of neutron capture and fission cross sections measurements. The facility, detectors and data analysis techniques are described, followed by a brief ...
Experimental astrophysical reaction rates of threshold (p,n)-reactions on Pd isotopes
(American Institute of Physics (AIP), 2008)
Astrophysical S-factors for (p,n) reactions on stable Pd isotopes derived from experimental cross sections were compared to statistical model predictions with the NON-SMOKER code. Satisfactory agreement was found. Reaction ...