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Statistics of 2+ levels in even-even nuclei

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Abul-Magd,  A. Y.
Prof. Hans A. Weidenmüller, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Harney,  H. L.
Prof. Hans A. Weidenmüller, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Weidenmüller,  H. A.
Prof. Hans A. Weidenmüller, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Citation

Abul-Magd, A. Y., Harney, H. L., & Weidenmüller, H. A. (2004). Statistics of 2+ levels in even-even nuclei. Physics Letters B, 579(3-4), 278-284.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-8CD7-7
Abstract
Using all the available empirical information, we analyze the spacing distributions of low-lying 2+ 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+ and 2+ 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.