6533b827fe1ef96bd1285efc
RESEARCH PRODUCT
Identification of a dipole band above the Iπ = 31/2- isomeric state in 189Pb
D. HodgeD. M. CullenM. J. TaylorM. G. ProcterPäivi NieminenTuomas GrahnPaul GreenleesKarl HauschildAndrej HerzanUlrika JakobssonP. JonesRauno JulinSakari JuutinenSteffen KetelhutMatti LeinoAraceli Lopez-martensJari PartanenPauli PeuraPanu RahkilaSami Rinta-antilaPanu RuotsalainenMikael SandzeliusJan SarénCatherine ScholeyJuha SorriSanna StolzeJuha Uusitalosubject
dipole bandsnuclear isomerslead isotopesPhysics::Atomic PhysicsNuclear Experimentexcited statesdescription
A dipole band of six transitions built upon a firmly established I π = 31/2− isomeric state has been identified in 189Pb using recoil-isomer tagging. This is the lightest odd-mass Pb nucleus in which a dipole band is known. The dipole nature of the new transitions has been confirmed through angular-intensity arguments. The evolution of the excitation energy and the aligned-angular momentum of the states in the new dipole band are compared with those of dipole bands in heavier, odd-mass lead isotopes. This comparison suggests that the new band in 189Pb is based upon a π[s−2 1/2h9/2i13/2]11− ⊗ ν[i −1 13/2+ ]13/2+ configuration. However, the increased aligned-angular momentum in 189Pb may suggest evidence for a reduced repulsive proton/neutron-hole interaction compared to dipole bands in the heavier mass isotopes. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-01-01 |