Rb 9737 60: The cornerstone of the region of deformation around A~100
Date
2015
Authors
Sotty, C.
Zielinska, M.
Georgiev, G.
Balabanski, D.L.
Stuchbery, Andrew
Blazhev, A.
Bree, N.
Chevrier, R.
Das Gupta, S.
Daugas, J.M.
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Volume Title
Publisher
American Physical Society
Abstract
Excited states of the neutron-rich nuclei Rb97,99 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 Rb97 as being built on the πg9/2 [431]3/2+ Nilsson-model configuration. The ground-state excitation spectra of the Rb isotopes show a marked distinction between single-particle-like structures below N=60 and rotational bands above. The present study defines the limits of the deformed region around A∼100 and indicates that the deformation of Rb97 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 Rb99 case demonstrates the challenges of studies with very short-lived postaccelerated radioactive beams.
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Source
Physical Review Letters
Type
Journal article
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Access Statement
Open Access