Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2008-08-29
Phys.Rev.C78:054310,2008
Physics
Nuclear Physics
Nuclear Experiment
21 pages, 12 figures, 2 tables, submitted to Phys. Rev. C
Scientific paper
10.1103/PhysRevC.78.054310
The masses of very neutron-deficient nuclides close to the astrophysical rp- and nu p-process paths have been determined with the Penning trap facilities JYFLTRAP at JYFL/Jyv\"askyl\"a and SHIPTRAP at GSI/Darmstadt. Isotopes from yttrium (Z = 39) to palladium (Z = 46) have been produced in heavy-ion fusion-evaporation reactions. In total 21 nuclides were studied and almost half of the mass values were experimentally determined for the first time: 88Tc, 90-92Ru, 92-94Rh, and 94,95Pd. For the 95Pdm, (21/2^+) high-spin state, a first direct mass determination was performed. Relative mass uncertainties of typically $\delta m / m = 5 \times 10^{-8}$ were obtained. The impact of the new mass values has been studied in nu p-process nucleosynthesis calculations. The resulting reaction flow and the final abundances are compared to those obtained with the data of the Atomic Mass Evaluation 2003.
Ackermann D.
Audi Georges
Äystö Juha
Batist L.
Blaum Klaus
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