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RESEARCH PRODUCT
The nuclear structure of 229Th
Gunnar NymanJ. KvasilJ. L. TainE. HagebøA MackovaN. KaffrellBirger FogelbergGunnar LøvhøidenK. GuldaT. MartinezA. J. AasOlof TengbladT.f. ThorsteinsenI. S. GrantD.g. BurkeHenryk MachBerta RubioM. J. G. BorgeW. Kurcewiczsubject
PhysicsNuclear and High Energy PhysicsElectron spectrometerTime delayedNuclear structureParity (physics)ElectronAtomic physicsCoriolis couplingMass separationCoincidencedescription
Abstract The γ -rays following the β − decay of 229 Ac have been investigated by means of γ -ray singles and γγ -coincidence measurements using Ge detectors. Multipolarities of 40 transitions in 229 Th have been established by measuring conversion electrons with a mini-orange electron spectrometer. The half-lives of the 146.35, 164.53 and 261.96 keV levels have been measured using the advanced time delayed βγγ (t) method. The low-lying states in 229 Th and observed transition rates have been interpreted within the quasiparticle–phonon model with inclusion of Coriolis coupling. Two octupole correlated parity partner bands, with K π =5/2 ± and K π =3/2 ± , were identified in 229 Th.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-05-01 | Nuclear Physics A |