Search
Now showing items 1-10 of 20
Nucleosynthesis in core-collapse supernova explosions triggered by a quark-hadron phase transition
(2012-10-10)
We explore heavy-element nucleosynthesis in the explosion of massive stars that are triggered by a quark-hadron phase transition during the early post-bounce phase of core-collapse supernovae. The present study is based ...
Neutron-induced fission cross section measurement of U-233, Am-241 and Am-243 in the energy range 0.5 MeV
(2012-10)
Neutron-induced fission cross section measurements of U-233, Am-243 and Am-241 relative to U-235 have been carried out at the neutron time-of-flight facility n_TOF at CERN. A fast ionization chamber has been employed. All ...
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 ...
Formalism for inclusion of measured reaction cross sections in stellar rates including uncertainties and its application to neutron capture in the s-process
(2012-08-10)
A general formalism to include experimental reaction cross sections into calculations of stellar rates is presented. It also allows us to assess the maximally possible reduction of uncertainties in the stellar rates by ...
Possible solution to the alpha-potential mystery in the gamma-process and the Nd/Sm ratio in meteorites
(SISSA, 2012-08)
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 ...
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
Measurement of resolved resonances of Th-232(n, gamma) at the n_TOF facility at CERN
(2012-06-01)
The yield of the neutron capture reaction Th-232(n, gamma) has been measured at the neutron time-of-flight facility n_TOF at CERN in the energy range from 1 eV to 1 MeV. The reduction of the acquired data to the capture ...
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 ...