6533b838fe1ef96bd12a3ced
RESEARCH PRODUCT
Evidence of octupole-phonons at high spin in 207Pb
B. Quintana ArnésG. BocchiR. PerezRaymond J. CarrollW. KortenAlberto PulliaM. LabicheZs. PodolyákA. NavinEnrique SanchisF. SaillantNorbert PietrallaF. C. L. CrespiC. M. ShandE. DupontB. FornalD. KochevaDiego BarrientosO. StezowskiP. ReiterL. AtanasovaM. CiemalaHerbert HessRoberto MenegazzoD. MengoniB. BirkenbachJ. ColladoH.j. EberthBo CederwallD. RaletB. MillionA. MajP. Van IsackerD. WilmsenJ. J. Valiente DobonJ. DudouetF. RecchiaP. BednarczykM. RejmundGeorgi P. GeorgievAndrew StuchberyA. GoasduffA. LemassonDeyan YordanovP. R. JohnP. R. JohnSalsacR. L. LozevaA. JungclausC. MichelagnoliA. BlazhevJ. GoupilS. FranchooA. GadeaL. J. HarknessJohan NybergS. M. LenziD. L. BalabanskiD. M. CullenI. BurrowsT. KonstantinopoulosEmyr ClementH. C. BostonO. WielandC. TheisenA. J. BostonA. KusogluC. FransenA. KorichiS. LeoniC. Müller-gatermannJ. Ljungvallsubject
Nuclear and High Energy PhysicsPlunger devicePhononNuclear TheoryOctupole phonon[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]gamma-Ray trackingγ -Ray tracking01 natural sciences7. Clean energyRecoilVAMOS++ spectrometerAGATA spectrometer; Nuclear deformation; Octupole phonon; Plunger device; VAMOS++ spectrometer; γ-Ray tracking0103 physical sciencesPhysics::Atomic PhysicsAGATA spectrometerNuclear Experiment010306 general physicsSpin (physics)PhysicsVAMOS plus plus spectrometer010308 nuclear & particles physicsγ-Ray trackinglcsh:QC1-999Nuclear deformationAtomic physicslcsh:Physicsdescription
A lifetime measurement of the 19/2 state in Pb has been performed using the Recoil Distance Doppler-Shift (RDDS) method. The nuclei of interest were produced in multi-nucleon transfer reactions induced by a Pb beam impinging on a Mo enriched target. The beam-like nuclei were detected and identified in terms of their atomic mass number in the VAMOS++ spectrometer while the prompt γ rays were detected by the AGATA tracking array. The measured large reduced transition probability B(E3,19/2→13/2)=40(8) W.u. is the first indication of the octupole phonon at high spin in Pb. An analysis in terms of a particle-octupole-vibration coupling model indicates that the measured B(E3) value in Pb is compatible with the contributions from single-phonon and single particle E3 as well as E3 strength arising from the double-octupole-phonon 6 state, all adding coherently. A crucial aspect of the coupling model, namely the strong mixing between single-hole and the phonon-hole states, is confirmed in a realistic shell-model calculation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-10-01 |