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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 ...
Explosive H-burning, the rp-process, and X-ray bursts
(IOP Publishing Ltd., 1998)
The major astrophysical events which involve explosive H-burning are novae and type I X-ray bursts. Both are related to binary stellar systems with hydrogen accretion from a binary companion onto a compact object, and the ...
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 ...
Nucleosynthesis at the proton drip line - a challenge for nuclear physics
(American Institute of Physics (AIP), 1998)
The rp-process in X-ray bursts is investigated using a complete and updated nuclear reaction network from H to Sr, that is coupled to a one dimensional, one zone X-ray burst model. In particular we consider 2p-capture ...
Comparison of experimental and calculated S-factors of the p-process reaction Sm-144(alpha,gamma)Gd-148
(IOP Publishing Ltd., 1998)
The cross section of the Sm-144(alpha,gamma)Gd-148 reaction has been measured at bombarding energies in the 10.5 - 13.4 MeV range using an activation method based on the off-line alpha-activity measurement of the Gd-148 ...
Global statistical model calculations and the role of isospin
(IOP Publishing Ltd., 1998)
An improved code for the calculation of astrophysical reaction rates in the statistical model is presented. It includes the possibility to study isospin effects. Such effects heavily affect rates involving self-conjugate ...
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 ...