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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 ...
Investigation of the reaction Ge-74(p,gamma)As-75 using the in-beam method to improve reaction network predictions for p nuclei
(2012-09-14)
Background: Astrophysical models studying the origin of the neutron-deficient p nuclides require knowledge of proton capture cross sections at low energy. The production site of the p nuclei is still under discussion but ...
Investigation of alpha-induced reactions on I-127 for the astrophysical gamma process
(2012-09-04)
Background: The. process in core-collapse 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 gamma process reaction ...
Sensitivity of astrophysical reaction rates to nuclear uncertainties
(2012-08)
Sensitivities of nuclear reaction rates to a variation of nuclear properties are studied. Target nuclei range from proton-to neutron dripline for 10
Astrophysical analysis of the measurement of (alpha,gamma) and (alpha,n) cross sections of Tm-169
(2012-07-05)
Reaction cross sections of Tm-169(alpha, gamma)Lu-173 and Tm-169(alpha, n)Lu-172 have been measured in the energy range 12.6
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 ...
Neutron capture on Zr-94 : Resonance parameters and Maxwellian-averaged cross sections
(2011-07-15)
The neutron capture cross sections of the Zr isotopes play an important role in nucleosynthesis studies. The s-process reaction flow between the Fe seed and the heavier isotopes passes through the neutron magic nucleus ...
Chemical enrichment in the carbon-enhanced damped Ly α system by population III supernovae
(2011-04-01)
We show that the recently observed elemental abundance pattern of the carbon-rich metal-poor damped Ly alpha (DLA) system is in excellent agreement with the nucleosynthesis yields of faint core-collapse supernovae of ...
Alpha-induced reaction cross section measurements on Eu-151 for the astrophysical gamma-process
(2010-11)
In order to extend the experimental database relevant for the astrophysical gamma-process towards the unexplored heavier mass region, the cross sections of the Eu-151(alpha, gamma)Tb-155 and Eu-151 (alpha, n)Tb-154 reactions ...
Neutron physics of the Re/Os clock. I : Measurement of the (n, gamma) cross sections of Os-186,Os-187,Os-188 at the CERN n_TOF facility
(2010-07-15)
The precise determination of the neutron capture cross sections of Os-186 and Os-187 is important to define the s-process abundance of Os-187 at the formation of the solar system. This quantity can be used to evaluate the ...