Shape Coexistence in the Neutron-Deficient Even-Even Hg182−188 Isotopes Studied via Coulomb Excitation
Abstract
Coulomb-excitation experiments to study electromagnetic properties of radioactive even-even Hg
isotopes were performed with 2.85 MeV=nucleon mercury beams from REX-ISOLDE. Magnitudes and
relative signs of the reduced E2 matrix elements that couple the ground state and low-lying excited states in
182−188Hg were extracted. Information on the deformation of the ground and the first excited 0þ states was
deduced using the quadrupole sum rules approach. Results show that the ground state is slightly deformed
and of oblate nature, while a larger deformation for the excited 0þ state was noted in 182;184Hg. The results
are compared to beyond mean field and interacting-boson based models and interpreted within a two-state
mixing model. Partial agreement with the model calculations was obtained. The presence of two different
structures in the light even-mass mercury isotopes that coexist at low excitation energy is firmly
established.
Main Authors
Format
Articles
Research article
Published
2014
Series
Subjects
Publication in research information system
Publisher
American Physical Society
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201602021392Use this for linking
Review status
Peer reviewed
ISSN
0031-9007
DOI
https://doi.org/10.1103/PhysRevLett.112.162701
Language
English
Published in
Physical Review Letters
Citation
- Bree, N., Wrzosek-Lipska, K., Petts, A., Andreyev, A., Bastin, B., Bender, M., Blazhev, A., Bruyneel, B., Butler, P. A., Butterworth, J., Carpenter, M. P., Cederkäll, J., Clément, E., Cocolios, T. E., Deacon, A., Diriken, J., Ekström, A., Fitzpatrick, C., Fraile, L. M., . . . Zielińska, A. M. (2014). Shape Coexistence in the Neutron-Deficient Even-Even Hg182−188 Isotopes Studied via Coulomb Excitation. Physical Review Letters, 112(16), 162701. https://doi.org/10.1103/PhysRevLett.112.162701
Copyright© 2014 American Physical Society. Published in this repository with the kind permission of the publisher.