Search
Now showing items 1-10 of 18
The astrophysical r-process : A comparison of calculations following adiabatic expansion with classical calculations based on neutron densities and temperatures
(1999-05-01)
The rapid neutron-capture process (r-process) encounters unstable nuclei far from beta-stability. Therefore its observable features, like the abundances, witness (still uncertain) nuclear structure as well as the conditions ...
Explosive nucleosynthesis close to the drip lines
(1998-11)
We give an overview of explosive burning and the role which neutron and/or proton separation energies play. We focus then on the rapid neutron capture process (r-process) which encounters unstable nuclei with neutron ...
Dependence of direct neutron capture on nuclear-structure models
(1998-04)
The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. We calculate direct neutron capture on the even-even isotopes Sn124-145 and Pb208-238 with energy levels, masses, ...
First beta-decay studies of the neutron-rich isotopes Sc53-55 and V56-59
(1998-03-16)
The neutron-rich isotopes Sc53-55 and V56-59 have been produced at GANIL in interactions of a 64.5 MeV/u Cu-65 beam with a Be-9 target. They were separated by the doubly achromatic spectrometer LISE3. Beta-decay half-lives ...
rp-process nucleosynthesis at extreme temperature and density conditions
(1998-02)
We present nuclear reaction network calculations to investigate the influence of nuclear structure on the rp-process between Ge and Sn in various scenarios. Due to the lack of experimental data for neutron-deficient nuclei ...
Astrophysical and nuclear physics aspects of the r-process
(World Scientific Publishing, 1998)
The formation of elements as heavy as Th and U and beyond is due to the rapid neutron-capture process (r-process), which causes the production of highly unstable nuclei near the neutron drip-line and functions via neutron ...
Explosive nucleosynthesis and the astrophysical r-process
(American Institute of Physics (AIP), 1998)
We give an overview of chemical equilibria in explosive burning and the role which neutron and/or proton separation energies play. We focus then on the rapid neutron-capture process (r-process) which encounters unstable ...
Nuclear level density and the determination of thermonuclear rates for astrophysics
(1997-09)
The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. In recent calculations the nuclear level density-as an important ingredient to the statistical model ...
Applicability of the Hauser-Feshbach approach for the determination of astrophysical reaction rates
(1997-08-04)
Nuclear Astrophysics requires the knowledge of reaction rates over a wide range of nuclei and temperatures. In recent calculations the nuclear level density – as an important ingredient to the statistical model (Hauser-Feshbach) ...
Uncertainties in direct neutron capture calculations due to nuclear structure models
(1997-08-04)
The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. For spherical nuclei close to the dripline the statistical model (Hauser-Feshbach) approach is not applicable ...