Abstract
A reexamination of nuclear collective phase space is made, and some new types of collective motion are identified.
The nature of the negative-parity collective degrees of freedom and especially the role of dipole isoscalar modes in the structure of heavy nuclei are discussed. The possibility to interprete the unusual spectrum of 218Ra, admitting the active role of dipole phonons with low excitation energy is shown.
The open problems arising from the recent experimental findings and from their theoretical interpretation are discussed.
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© 1992 Springer Science+Business Media New York
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Mikhailov, I.N., Briançon, C. (1992). Open Questions on the Low-Energy Negative-Parity Excitations. In: Vergnes, M., Sauvage, J., Heenen, PH., Duong, H.T. (eds) Nuclear Shapes and Nuclear Structure at Low Excitation Energies. NATO ASI Series, vol 289. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3342-9_23
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DOI: https://doi.org/10.1007/978-1-4615-3342-9_23
Publisher Name: Springer, Boston, MA
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