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Cross section measurements of the Pd-102(p, gamma)Ag-103 Sn-116(p, gamma)Sb-117, and Sn-112(alpha, gamma)Te-116 reactions relevant to the astrophysical rp- and gamma-processes
(2002-11-18)
Total cross section measurements for the Pd-102(p, gamma)Ag-103 and Sn-116(p, gamma)Sb-117 reactions have been performed in the proton energy range 2.6 to 4.25 MeV, and for the Sn-112(alpha,gamma)T-116, reaction over the ...
Neutron capture of Si-30
(2002-10-21)
At the Karlsruhe and Tubingen 3.75 MV Van de Graaff accelerators the cross section of the reaction Si-30(n,gamma)Si-31(2.62h) was measured by the activation technique via the beta spectrum of the Si-31-decay. Natural silicon ...
Nucleosynthesis in massive stars with improved nuclear and stellar physics
(2002-09-01)
We present the first calculations to follow the evolution of all stable nuclei and their radioactive progenitors in stellar models computed from the onset of central hydrogen burning through explosion as Type II supernovae. ...
Measurement of the (gamma, n) cross section of the nucleus Au-197 close above the reaction threshold
(2002-08-26)
The cross section and the astrophysical reaction rate of the reaction Au-197(gamma,n)Au-196 have been measured close above the reaction threshold at E-thr = 8.071 MeV using the method of photoactivation. The results are ...
Direct neutron capture cross sections of Ni-62 in the s-process energy range
(2002-08)
Direct neutron capture on Ni-62 is calculated in the DWBA and the Maxwellian averaged cross sections and astrophysical reaction rates in the energy range relevant for s-process nucleosynthesis are given. It is confirmed ...
Technetium-97 and p-radionuclides
(2002-08)
V-45(p,gamma) thermonuclear reaction rate relevant to Ti-44 production in core-collapse supernovae : General estimates and shell model analysis
(2002-07)
The lack of knowledge of the V-45(p,gamma) reaction rate has been shown to contribute a large uncertainty to the production of Ti-44 in core-collapse supernovae. By considering likely contributions from resonances associated ...
Massive star evolution : nucleosynthesis and nuclear reaction rate uncertainties
(2002-07)
We present a nucleosynthesis calculation of a 25 M-circle dot star of solar composition that includes all relevant isotopes up to polonium. We follow the stellar evolution from hydrogen burning till iron core collapse and ...
alpha- and neutron-induced reactions on ruthenium isotopes
(2002-07)
The uncertain origin of the proton rich Mo and Ru isotopes has motivated cross-section measurements of alpha- and neutron-induced reactions. The experiments were performed via the activation technique by irradiating thin ...
New Maxwellian averaged neutron capture cross sections for Cl-35,Cl-37
(2002-05)
The Oak Ridge Electron Linear Accelerator (ORELA) was used to measure neutron total and capture cross sections of natural chlorine in the energy range from 100 eV to 600 keV. We performed an R-matrix analysis of our new ...