Mass measurements in the vicinity of the r p-process and the {nu} p-process paths with the Penning trap facilities JYFLTRAP and SHIPTRAP
- Department of Physics, University of Jyvaeskylae, FI-40014 Jyvaeskylae (Finland)
- Institut fuer Physik, Johannes Gutenberg-Universitaet, D-55099 Mainz (Germany)
- Enrico Fermi Institute, Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637 (United States)
- GSI-Darmstadt mbH, D-64291 Darmstadt (Germany)
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/Jyvaeskylae 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: {sup 88}Tc, {sup 90-92}Ru, {sup 92-94}Rh, and {sup 94,95}Pd. For the {sup 95}Pd{sup m}, (21/2{sup +}) high-spin state, a first direct mass determination was performed. Relative mass uncertainties of typically {delta}m/m=5x10{sup -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 with those obtained with the data of the Atomic Mass Evaluation 2003.
- OSTI ID:
- 21199359
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 78, Issue 5; Other Information: DOI: 10.1103/PhysRevC.78.054310; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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