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The spestroscopy and structure of odd-A Fr isotopes withA=213–225

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Czechoslovak Journal of Physics Aims and scope

Abstract

The remarkable features of the spectra of the odd-A Fr isotopes from213Fr (with 126 neutrons) through225Fr (with 138 neutrons) serve as a sequence of examples for the application of a variety of nuclear models. As the shapes vary from spherical to spherical with strong octupole correlations to octupole-deformed, the corresponding symmetry breaking leads to increasingly complex spectra. Of considerable interest is the fact that the219Fr 9/2 ground state has the character of an h9/2 shell model state while still having the rotational properties appropriate as a legitimate member of a reflection asymmetric K=1/2 band. It is also possible to follow the expansion of the more degenerate shell model states into the less degenerate reflection asymmetric states. This results from dramatic decreasing in decoupling parameters with increasing mass number.

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Sheline, R.K., Liang, C.F., Paris, P. et al. The spestroscopy and structure of odd-A Fr isotopes withA=213–225. Czech J Phys 50, 949–968 (2000). https://doi.org/10.1023/A:1022887329369

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