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Sensitivity of the C and O production on the 3 alpha rate
(2004)
We investigate the dependence of the carbon and oxygen production in stars on the 3alpha rate by varying the energy of the 0(2)(+)-state of (12)C and determine the resulting yields for a selection of low-mass, intermediate-mass ...
Proton induced reaction cross section measurements on Se isotopes for the astrophysical p process
(2003-11)
As a continuation of a systematic study of reactions relevant to the astrophysical p process, the cross sections of the Se-74,Se-76(p,gamma) Br-75,Br-77 and Se-82(p,n) Br-82 reactions have been measured at energies from ...
Observing nucleon decay in lead perchlorate
(2003-10-01)
Lead perchlorate, part of the OMNIS supernova neutrino detector, contains two nuclei Pb-208 and Cl-35 that might be used to study nucleon decay. Both would produce signatures that will make them especially useful for ...
Nuclear partition functions at temperatures exceeding 10(10) K
(2003-08)
Nuclear partition functions were calculated for a grid of temperatures from 1.2 x 10(10) to 2.75 x 10(11) K (1 MeV less than or equal to kT less than or equal to 24 MeV) within a Fermi-gas approach, including all nuclides ...
Neutron capture reaction rates for silicon and their impact on the origin of presolar mainstream SiC grains
(2003-06)
We have made new, improved measurements of the Si28-30 (n, gamma) cross sections and have done a resonance analysis of these data including previous total cross sections. Together with the calculated contributions due to ...
Evolution and nucleosynthesis of massive stars and related nuclear uncertainties
(2003-05-19)
Properties of atomic nuclei important for the prediction of astrophysical reaction rates are reviewed. In the first part, a recent simulation of evolution and nucleosynthesis of stars between 15 and 25 M-circle dot is ...
Measurements of astrophysical neutron capture cross sections via the inverse reaction
(2003-05-19)
Neutron capture of short-lived isotopes can be important within several astrophysical environments. The laboratory investigation of these reactions can be difficult since these isotopes cannot form a target. We used ...
Short-lived p-nuclides in the early solar system and implications on the nucleosynthetic role of X-ray binaries
(2003-05-19)
The data available for short-lived p-nuclides are used in an open nonlinear model of the chemical evolution of the Galaxy in order to discuss the origin of extinct radionuclides, the stellar sources of p-nuclides, and the ...
Determination of a-nucleus potentials by alpha-elastic scattering and its implications for the gamma-process
(2003-05-19)
Complete angular distributions for the reactions Sn-112,Sn-124(alpha,alpha)(112,124) Sn have been measured at different energies around the Coulomb barrier. Preliminary results for the Sn-112 circle times alpha and Sn-124 ...