Shape Coexistence in the Neutron- Deficient Even-Even Hg182-188 Isotopes Studied via Coulomb Excitation



Bree, N, Wrzosek-Lipska, K, Petts, A, Andreyev, A, Bastin, B, Bender, M, Blazhev, A, Bruyneel, B, Butler, PA, Butterworth, J
et al (show 60 more authors) (2014) Shape Coexistence in the Neutron- Deficient Even-Even Hg182-188 Isotopes Studied via Coulomb Excitation. Physical Review Letters, 112.

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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 E 2 matrix elements that couple the ground state and low-lying excited states in 182 − 188 Hg were extracted. Information on the deformation of the ground and the first excited 0 + 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 0 + state was noted in 182 , 184 Hg . 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.

Item Type: Article
Additional Information: Ag3nj Times Cited:0 Cited References Count:37## TULIP Type: Articles/Papers (Journal) ## official_url: <Go to ISI>://000335325900004
Uncontrolled Keywords: rex-isolde, nuclei, states, intruder, moments, hg-186, pb
Depositing User: Symplectic Admin
Date Deposited: 14 Jan 2020 11:35
Last Modified: 06 Jan 2022 08:19
DOI: 10.1103/Physrevlett.112.162701
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3070618