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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, P A and Butterworth, J, et al. (2014) In Physical Review Letters 112(16).
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 Hg182-188 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 Hg182,184. The results are compared to beyond mean field and interacting-boson based models and interpreted within a two-state mixing model. Partial... (More)
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 Hg182-188 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 Hg182,184. 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. (Less)
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Physical Review Letters
volume
112
issue
16
publisher
American Physical Society
external identifiers
  • pmid:24815644
  • wos:000335325900004
  • scopus:84899579401
ISSN
1079-7114
DOI
10.1103/PhysRevLett.112.162701
language
English
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yes
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ade48b9d-2adc-4ede-bd71-dd2c2a8955b6 (old id 4455410)
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2014-06-08 11:04:03
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@article{ade48b9d-2adc-4ede-bd71-dd2c2a8955b6,
  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 Hg182-188 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 Hg182,184. 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.},
  articleno    = {162701},
  author       = {Bree, N and Wrzosek-Lipska, K and Petts, A and Andreyev, A and Bastin, B and Bender, M and Blazhev, A and Bruyneel, B and Butler, P A and Butterworth, J and Carpenter, M P and Cederkäll, Joakim and Clément, E and Cocolios, T E and Deacon, A and Diriken, J and Ekström, Andreas and Fitzpatrick, C and Fraile, L M and Fransen, Ch and Freeman, S J and Gaffney, L P and García-Ramos, J E and Geibel, K and Gernhäuser, R and Grahn, T and Guttormsen, M and Hadinia, B and Hadyńska-Kle K, K and Hass, M and Heenen, P-H and Herzberg, R-D and Hess, H and Heyde, K and Huyse, M and Ivanov, O and Jenkins, D G and Julin, R and Kesteloot, N and Kröll, Th and Krücken, R and Larsen, A C and Lutter, R and Marley, P and Napiorkowski, P J and Orlandi, R and Page, R D and Pakarinen, J and Patronis, N and Peura, P J and Piselli, E and Rahkila, P and Rapisarda, E and Reiter, P and Robinson, A P and Scheck, M and Siem, S and Singh Chakkal, K and Smith, J F and Srebrny, J and Stefanescu, I and Tveten, G M and Van Duppen, P and Van de Walle, J and Voulot, D and Warr, N and Wenander, F and Wiens, A and Wood, J L and Zielińska, M},
  issn         = {1079-7114},
  language     = {eng},
  number       = {16},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Shape Coexistence in the Neutron-Deficient Even-Even Hg182-188 Isotopes Studied via Coulomb Excitation.},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.112.162701},
  volume       = {112},
  year         = {2014},
}