Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2010-11-27
Eur.Phys.J.A25:515-516,2005
Physics
Nuclear Physics
Nuclear Theory
2 pages, 1 figure, Contribution to the Fourth International Conference on Exotic Nuclei and Atomic Masses (ENAM'04), September
Scientific paper
10.1140/epjad/i2005-06-108-y
Relative binding energies (RBEs) within three isotopic chains ($^{100-130}$Sn, $^{152-181}$Yb, and $^{181-202 }$Pb) have been studied using the exactly solvable extended pairing model (EPM) \cite{FPan04}. The unique pairing strength $G$, which reproduces the experimental RBEs, has been determined. Within EPM, $\log(G)$ is a smooth function of the model space dimension $\dim(A)$, as expected for an effective coupling strength. In particular, for the Pb and Sn isotopes $G$ can be described by a two parameter expression that is inversely proportional to the dimensionality of the model space, $G=\alpha\dim(A)^{-\beta}$ with $\beta\approx 1$. PACS Classification: 21.10.Dr Binding energies, 71.10.Li Pairing interactions in model systems, and 21.60.Cs Shell model.
Draayer Jerry P.
Gueorguiev Vesselin G.
Pan Feng
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