A. Y. Abul-Magd, H. L. Harney, M. H. Simbel, H. A. Weidenmueller
Published 2002-12-13, updated 2004-11-30Version 2
Using all the available empirical information, we analyze the spacing distributions of low-lying 2-plus levels of even-even nuclei. To obtain statistically relevant samples, the nuclei are grouped into classes defined by the ratio R4/2 of the excitation energies of the first 4-plus and 2-plus levels. This ratio serves as a measure of collectivity in nuclei. With the help of Bayesian inference, we determine the chaoticity parameter for each class. This parameter is found to vary strongly with R4/2 and takes particularly small values in nuclei that have one of the dynamical symmetries of the interacting Boson model.
Comments: 11 pages, 2 figures; v2: added references; layout improved
Journal: Phys.Lett. B579 (2004) 278-284
Phenomenological description of the states $0^+$ and $2^+$ in some even-even nuclei
On E0 Transitions in even-even nuclei
Toward a nuclear mass table with the continuum and deformation effects: even-even nuclei in the nuclear chart
