6533b7d9fe1ef96bd126c141
RESEARCH PRODUCT
Shape Coexistence in the Neutron-Deficient Even-EvenHg182−188Isotopes Studied via Coulomb Excitation
N. BreeK. Wrzosek-lipskaA. PettsA. AndreyevB. BastinM. BenderA. BlazhevB. BruyneelP. A. ButlerJ. ButterworthM. P. CarpenterJ. CederkällE. ClémentT. E. CocoliosA. DeaconJ. DirikenA. EkströmC. FitzpatrickL. M. FraileCh. FransenS. J. FreemanL. P. GaffneyJ. E. García-ramosK. GeibelR. GernhäuserT. GrahnM. GuttormsenB. HadiniaK. Hadyńska-kle¸kM. HassP.-h. HeenenR.-d. HerzbergH. HessK. HeydeM. HuyseO. IvanovD. G. JenkinsR. JulinN. KestelootTh. KröllR. KrückenA. C. LarsenR. LutterP. MarleyP. J. NapiorkowskiR. OrlandiR. D. PageJ. PakarinenN. PatronisP. J. PeuraE. PiselliP. RahkilaE. RapisardaP. ReiterA. P. RobinsonM. ScheckS. SiemK. Singh ChakkalJ. F. SmithJ. SrebrnyI. StefanescuG. M. TvetenP. Van DuppenJ. Van De WalleD. VoulotN. WarrF. WenanderA. WiensJ. L. WoodM. Zielińskasubject
PhysicsMean field theoryExcited stateQuadrupoleGeneral Physics and AstronomyNeutronCoulomb excitationAtomic physicsNucleonGround state7. Clean energyExcitationdescription
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 Hg-182; 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-04-23 | Physical Review Letters |