Abstract
Excited states of the neutron-rich nuclei were populated for the first time using the multistep Coulomb excitation of radioactive beams. Comparisons of the results with particle-rotor model calculations provide clear identification for the ground-state rotational band of as being built on the Nilsson-model configuration. The ground-state excitation spectra of the Rb isotopes show a marked distinction between single-particle-like structures below and rotational bands above. The present study defines the limits of the deformed region around and indicates that the deformation of is essentially the same as that observed well inside the deformed region. It further highlights the power of the Coulomb-excitation technique for obtaining spectroscopic information far from stability. The case demonstrates the challenges of studies with very short-lived postaccelerated radioactive beams.
- Received 3 August 2015
- Publisher error corrected 5 November 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.172501
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Published by the American Physical Society
Corrections
5 November 2015