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Experimental cross section of Sm-144(alpha, gamma)Gd-148 and implications for the p-process
(1998-05-20)
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 ...
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, ...
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 ...
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 ...
Sm-144-alpha optical potential at astrophysically relevant energies derived from Sm-144(alpha,alpha) Sm-144 elastic scattering
(1997-03)
For the determination of the Sm-144-alpha optical potential we measured the angular distribution bf Sm-144(alpha, alpha)Sm-144 scattering at the energy E(lab)=20 MeV with high accuracy. Using the known systematics pf ...
Neutron capture reaction rates of unstable isotopes in the s-process branchings
(SOC ITALIANA FISICA, 1997)
Neutron-induced nucleosynthesis
(1996-11)
Neutron-induced nucleosynthesis plays an important role in astrophysical scenarios like in primordial nucleosynthesis in the early universe, in the s-process occurring in Red Giants, and in the cu-rich freeze-out and ...
Ge-70(alpha,gamma)Se-74 cross section measurements at energies of astrophysical interest
(1996-07)
The cross section of the reaction Ge-70(alpha, gamma)Se-74 has been measured over the bombarding energy range of 5.05 MeV <E(alpha) <7.80 MeV using single and coincidence gamma spectroscopy techniques. The experimental ...
Direct neutron capture for magic-shell nuclei
(1996-01)
In neutron capture for magic-shell nuclei the direct reaction mechanism can be important and may even dominate. As an example we investigated the reaction Ca-48(n, gamma)Ca-49 for projectile energies below 250 keV in a ...
Reaction-rates for Sm-146 production in supernovae
(1995-09-20)
Correlations of the Nd-142/Nd-144 ratio with the Sm/Nd ratio in some meteorites have been previously explained by the alpha-decay of long-lived Sm-146. In order to account for these observations, a necessary production ...