Rainovski, G., Pietralla, N., Ahn, T. et al. (5 more authors) (2006) Stabilization of Nuclear Isovector Valence-Shell Excitations. Physical Review Letters, 96 (12). pp. 122501-1. ISSN 1079-7114
Abstract
Excited states in 138Ce have been studied via the 12C(138Ce,138Ce*) Coulomb excitation reaction at 480 MeV. Relative cross sections have been determined from the gamma-ray yields observed with Gammasphere. The E2 and M1 strength distributions between the lowest six 2+ states up to 2.7 MeV enables us to identify the 2<sub>4</sub><sup>+</sup> state in 138Ce as the dominant fragment of the one-phonon 2<sub>1,ms</sub><sup>+</sup> mixed-symmetry state. Mixing between this level and a nearby isoscalar state is observed and is more than 4 times larger than in the neighboring isotone 136Ba. This is direct evidence that the stability of mixed-symmetry states strongly depends on the underlying subshell structure.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | York RAE Import |
Date Deposited: | 24 Feb 2009 10:41 |
Last Modified: | 24 Feb 2009 10:41 |
Published Version: | http://dx.doi.org/10.1103/PhysRevLett.96.122501 |
Status: | Published |
Publisher: | The American Physical Society. |
Identification Number: | 10.1103/PhysRevLett.96.122501 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:7247 |