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

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

2005-08-02

arxiv.org/abs/nucl-th/0508003v1

Phys.Rev.Lett. 95 (2005) 042501

Physics

Nuclear Physics

Nuclear Theory

Physics Review Letters 95 (2005) 042501 http://link.aps.org/abstract/PRL/v95/e042501

Scientific paper

10.1103/PhysRevLett.95.042501

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<=Z<=92) were obtained with a typical uncertainty of 30 microunits. 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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