6533b7d3fe1ef96bd126002e
RESEARCH PRODUCT
Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes
R. LutterJ. E. García-ramosD. Di JulioE. RapisardaE. RapisardaH. De WitteT. KröllMark HuyseM. BenderJ. IwanickiK. Wrzosek-lipskaK. Wrzosek-lipskaR. GernhäuserN. LecesneTuomas GrahnTuomas GrahnPauli PeuraPauli PeuraPaul-henri HeenenJan DirikenV. BildsteinM. SferrazzaL. PróchniakThomas Elias CocoliosThomas Elias CocoliosThomas Elias CocoliosKristiaan HeydeP. ReiterE. PiselliM. SjödinIain DarbyIain DarbyIain DarbyFredrik WenanderA. BlazhevKalle AuranenKalle AuranenUlrika JakobssonUlrika JakobssonJanne PakarinenJanne PakarinenJoonas KonkiJoonas KonkiM. SeidlitzC. BauerM. J. VermeulenB. SiebeckN. KestelootB. BastinE. TraykovM. ZielinskaMarcus ScheckEmyr ClementC. FransenPanu RahkilaPanu RahkilaD. VoulotLiam GaffneyLiam GaffneyB. LaurentA. DamyanovaS. BönigJ. Van De WalleN. WarrH. TörnqvistP. Van DuppenN. BreeHerbert HessKathrin Wimmersubject
CHARGE RADIINuclear and High Energy PhysicsTRANSITION-PROBABILITYchemistry.chemical_elementCoulomb excitation[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]7. Clean energy01 natural sciences114 Physical sciencessymbols.namesakeMatrix (mathematics)NUCLEAR-DATA SHEETSCOULOMB-EXCITATION0103 physical sciencesSTATE PROPERTIESNuclear Physics - ExperimentNeutronfysiikka010306 general physicsEVEN-EVEN NUCLIDESMixing (physics)isotopesPoloniumINTRUDER STATESGAMMA-RAY SPECTROSCOPYPhysicsSPIN STATESisotoopitPO ISOTOPESIsotopeta114010308 nuclear & particles physicsBohr modelchemistryPhysics and AstronomysymbolsAtomic physicsInteracting boson modelphysicspolonium25.70.De 23.20.Js 25.60.−t 27.80.+wdescription
Coulomb-excitation experiments are performed with postaccelerated beams of neutron-deficient Po196,198,200,202 isotopes at the REX-ISOLDE facility. A set of matrix elements, coupling the low-lying states in these isotopes, is extracted. In the two heaviest isotopes, Po200,202, the transitional and diagonal matrix elements of the 2+1 state are determined. In Po196,198 multistep Coulomb excitation is observed, populating the 4+1,0+2, and 2+2 states. The experimental results are compared to the results from the measurement of mean-square charge radii in polonium isotopes, confirming the onset of deformation from Po196 onwards. Three model descriptions are used to compare to the data. Calculations with the beyond-mean-field model, the interacting boson model, and the general Bohr Hamiltonian model show partial agreement with the experimental data. Finally, calculations with a phenomenological two-level mixing model hint at the mixing of a spherical structure with a weakly deformed rotational structure.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-11-01 |