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Astrophysical S-factor for alpha-Capture of (113)In in the p-Process Energy Range
(American Institute of Physics, 2009)
The cross sections of (113)In(alpha, gamma)(117)Sb and (113)In(alpha,n)(116)Sb reactions have been measured using the activation method. The experiments were carried out at the ATOMKI cyclotron accelerator in the center ...
Two effects relevant for the study of astrophysical reaction rates : gamma transitions in capture reactions and Coulomb suppression of the stellar enhancement
(American Institute of Physics (AIP), 2009)
Nucleosynthesis processes involve reactions on several thousand nuclei, both close to and far off stability. The preparation of reaction rates to be used in astrophysical investigations requires experimental and theoretical ...
The (85)Rb(p,n)(85)Sr reaction and the modified proton optical potential
(American Institute of Physics (AIP), 2009)
The cross sections of the astrophysically relevant (85)Rb(p,n)(85)Sr(g,m) reaction have been measured between E(c.m). = 2.16 and 3.96 MeV. The cross sections have been derived by measuring the gamma radiation following the ...
Coulomb Suppression of the Stellar Enhancement Factor
(2008-11-07)
It is commonly assumed that reaction measurements for astrophysics should be preferably performed in the direction of a positive Q value to minimize the impact of the stellar enhancement factor, i.e., the difference between ...
Mass measurements in the vicinity of the r p-process and the nu p-process paths with the Penning trap facilities JYFLTRAP and SHIPTRAP
(2008-11)
The masses of very neutron-deficient nuclides close to the astrophysical r p- and nu p-process paths have been determined with the Penning trap facilities JYFLTRAP at JYFL/Jyvaskyla and SHIPTRAP at GSI/Darmstadt. Isotopes ...
Iron 60 evidence for early injection and efficient mixing of stellar debris in the protosolar nebula
(2008-10-10)
Among extinct radioactivities present in meteorites, Fe-60 (t(1/2) = 1.49 Myr) plays a key role as a high-resolution chronometer, a heat source in planetesimals, and a fingerprint of the astrophysical setting of solar ...
Experimental study of the (91)Zr(n, gamma) reaction up to 26 keV
(2008-10)
The neutron capture cross sections of the Zr isotopes are relevant to studies in nuclear structure, nuclear astrophysics, and nuclear technology. The valence neutron of (91)Zr with respect to the neutron magic nucleus ...
Complete inclusion of parity-dependent level densities in the statistical description of astrophysical reaction rates
(2008-09-04)
Microscopic calculations show a strong parity dependence of the nuclear level density at low excitation energy of a nucleus. Previously, this dependence has either been neglected or only implemented in the initial and final ...
Astrophysical relevance of gamma transition energies
(2008-09)
The relevant gamma energy range is explicitly identified where additional gamma strength must be located to have an impact on astrophysically relevant reactions. It is shown that folding the energy dependences of the ...
Cross section measurements of alpha-induced reactions on (92,94)Mo and (112)Sn for p-process studies
(2008-08)
The (92)Mo(alpha, n)(95)Ru, (94)Mo(alpha, n)(97)Ru, and (112)Sn(alpha, gamma)(116)Te cross sections were measured at the upper end of the p-process Gamow window between 8.2 and 11.1 MeV. Our results are slightly lower than ...