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High-accuracy determination of the U 238 / U 235 fission cross section ratio up to ≈1 GeV at n-TOF at CERN
(2015-02-09)
The U238 to U235 fission cross section ratio has been determined at n-TOF up to ≈1 GeV, with two different detection systems, in different geometrical configurations. A total of four datasets has been collected and compared. ...
Testing the role of SNe Ia for galactic chemical evolution of p-nuclei with two-dimensional models and with s-process seeds at different metallicities
(2015-01-15)
The bulk of p isotopes is created in the "gamma processes" mainly by sequences of photodisintegrations and beta decays in explosive conditions in Type Ia supernovae (SNIa) or in core collapse supernovae (ccSN). The ...
Neutron cross-sections for advanced nuclear systems : The n-TOF project at CERN
(2014-12-10)
The study of neutron-induced reactions is of high relevance in a wide variety of fields, ranging from stellar nucleosynthesis and fundamental nuclear physics to applications of nuclear technology. In nuclear energy, high ...
Radiogenic p-isotopes from type Ia supernova, nuclear physics uncertainties, and galactic chemical evolution compared with values in primitive meteorites
(2014-11-10)
The nucleosynthesis of proton-rich isotopes is calculated for multi-dimensional Chandrasekhar-mass models of Type Ia supernovae (SNe Ia) with different metallicities. The predicted abundances of the short-lived radioactive ...
GEANT4 simulation of the neutron background of the C6D 6 set-up for capture studies at n-TOF
(2014-10-01)
The neutron sensitivity of the C6D6 detector setup used at n-TOF facility for capture measurements has been studied by means of detailed GEANT4 simulations. A realistic software replica of the entire n-TOF experimental ...
Cross-section measurement of the Ba 130 (p,γ) La 131 reaction for γ -process nucleosynthesis
(2014-09-25)
Background: Deviations between experimental data of charged-particle-induced reactions and calculations within the statistical model are frequently found. An extended data base is needed to address the uncertainties regarding ...
Measurement and analysis of the Am 243 neutron capture cross section at the n-TOF facility at CERN
(2014-09-11)
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. ...
Measurement of the 12C(n,p)12B cross section at n-TOF at CERN by in-beam activation analysis
(2014-08-19)
The integral cross section of the 12C(n,p)12B reaction has been determined for the first time in the neutron energy range from threshold to several GeV at the n-TOF facility at CERN. The measurement relies on the activation ...
Alpha induced reaction cross section measurements on 162Er for the astrophysical γ process
(2014-07-30)
The cross sections of the Er162(α,γ)Yb166 and Er162(α,n)Yb165 reactions have been measured for the first time. The radiative alpha capture reaction cross section was measured from Ec.m.=16.09MeV down to Ec.m.=11.21MeV, ...
Experimental cross sections of Ho 165 (α,n) Tm 168 and Er 166 (α,n) Yb 169 for optical potential studies relevant for the astrophysical γ process
(2014-06-30)
Background: Optical potentials are crucial ingredients for the prediction of nuclear reaction rates needed in simulations of the astrophysical γ process. Associated uncertainties are particularly large for reactions involving ...