Shape Coexistence in the Neutron-Deficient Even-Even $^{182-188}$Hg 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
- Butterworth, J
- Carpenter, M P
- Cederkäll, J
- Clément, E
- Cocolios, T E
- Deacon, A
- Diriken, J
- Ekström, A
- Fitzpatrick, C
- Fraile, L M
- Fransen, Ch
- Freeman, S J
- Gaffney, L P
- García-Ramos, J E
- Geibel, K
- Gernhäuser, R
- Grahn, T
- Guttormsen, M
- Hadinia, B
- Hadyńska-Kle¸k, K
- Hass, M
- Heenen, P -H
- Herzberg, R -D
- Hess, H
- Heyde, K
- Huyse, M
- Ivanov, O
- Jenkins, D G
- Julin, R
- Kesteloot, N
- Kröll, Th
- Krücken, R
- Larsen, A C
- Lutter, R
- Marley, P
- Napiorkowski, P J
- Orlandi, R
- Page, R D
- Pakarinen, J
- Patronis, N
- Peura, P J
- Piselli, E
- Rahkila, P
- Rapisarda, E
- Reiter, P
- Robinson, A P
- Scheck, M
- Siem, S
- Singh Chakkal, K
- Smith, J F
- Srebrny, J
- Stefanescu, I
- Tveten, G M
- Van Duppen, P
- Van de Walle, J
- Voulot, D
- Warr, N
- Wenander, F
- Wiens, A
- Wood, J L
- Zielińska, M
DOIAbstract
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 agre...
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