6533b830fe1ef96bd129665c
RESEARCH PRODUCT
Blurring the Boundaries: Decays of Multiparticle Isomers at the Proton Drip Line
Jennifer SimpsonC. ScholeyPaul GreenleesA.-p. LeppänenT. GrahnK. AndgrenM. NymanC. Gray-jonesRauno JulinBaharak HadiniaIain DarbyD. SeweryniakRaymond J. CarrollS. JuutinenS. EeckhaudtBo CederwallJan SarénRobert PageDavid O'donnellMatti LeinoJuha UusitaloJanne PakarinenMikael SandzeliusPeter M. JonesP. RahkilaD. T. Josssubject
PhysicsGeneral Physicsta114Astrophysics::High Energy Astrophysical PhenomenaGeneral Physics and AstronomyObservableParity (physics)total data readoutmedicine.anatomical_structurePhysics::Atomic and Molecular Clustersmedicinegreat spectrometerAlpha decayNuclidePhysics::Chemical PhysicsAtomic physicsProton emissionNuclear ExperimentNucleusdescription
A multiparticle spin-trap isomer has been discovered in the proton-unbound nucleus Ta85 73158. The isomer mainly decays by γ-ray emission with a half-life of 6.1(1) μs. Analysis of the γ-ray data shows that the isomer lies 2668 keV above the known 9+ state and has a spin 10 higher and negative parity. This 19- isomer also has an 8644(11) keV, 1.4(2)% α-decay branch that populates the 9+ state in Lu154. No proton-decay branch from the isomer was identified, despite the isomer being unbound to proton emission by 3261(14) keV. This remarkable stability against proton emission is compared with theoretical predictions, and the implications for the extent of observable nuclides are considered. © 2014 American Physical Society.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-03-04 | Physical Review Letters |