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Isospin Dependence in the Odd-Even Staggering of Nuclear Binding Energies

Yu. A. LitvinovGesellschaft für Schwerionenforschung GSI, Darmstadt, GermanyT. BürvenichDivision Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,H. GeißelUniversity of Giessen, Giessen, GermanyYu. N. NovikovUniversity of Giessen, Giessen, GermanyZ. PatykUniversity of Giessen, Giessen, GermanyC. ScheidenbergerUniversity of Giessen, Giessen, GermanyF. AttallahUniversity of Giessen, Giessen, GermanyG. AudiUniversity of Giessen, Giessen, GermanyK. BeckertUniversity of Giessen, Giessen, GermanyF. BoschGiessen School of TheologyM. FalchUniversity of Giessen, Giessen, GermanyB. FranzkeUniversity of Giessen, Giessen, GermanyM. HausmannUniversity of Giessen, Giessen, GermanyTh. KerscherUniversity of Giessen, Giessen, GermanyO. KlepperUniversity of Giessen, Giessen, GermanyH.-J. KlugeUniversity of Giessen, Giessen, GermanyC. KozhuharovUniversity of Giessen, Giessen, GermanyK.E.G. LöbnerUniversity of Giessen, Giessen, GermanyD.G. MadlandUniversity of Giessen, Giessen, GermanyJ. A. MaruhnUniversity of Giessen, Giessen, GermanyG. MünzenbergUniversity of Giessen, Giessen, GermanyF. NoldenUniversity of Giessen, Giessen, GermanyT. RadonUniversity of Giessen, Giessen, GermanyM. SteckUniversity of Giessen, Giessen, GermanyS. TypelUniversity of Giessen, Giessen, GermanyH. WöllnikUniversity of Giessen, Giessen, Germany

2005en

ABI

Annotatsiya

The FRS-ESR facility at GSI provides unique conditions for precision measurements of large areas on the nuclear mass surface in a single experiment. Values for masses of 604 neutron-deficient nuclides (30 < or = Z < or = 92) were obtained with a typical uncertainty of 30 microu. The masses of 114 nuclides were determined for the first time. The odd-even staggering (OES) of nuclear masses was systematically investigated for isotopic chains between the proton shell closures at Z = 50 and Z = 82. The results were compared with predictions of modern nuclear models. The comparison revealed that the measured trend of OES is not reproduced by the theories fitted to masses only. The spectral pairing gaps extracted from models adjusted to both masses, and density related observables of nuclei agree better with the experimental data.

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DOI: 10.1103/physrevlett.95.042501

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