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RESEARCH PRODUCT
The Isomeric 9/2+and the Lowest 7/2-State in the Weakly Deformed N = 89 Nuclei
T. TuurnalaE LiukkonenE. HammarénR. KatajanheimoA. Siivolasubject
PhysicsClassical mechanics010308 nuclear & particles physics0103 physical sciencesState (functional analysis)Atomic physics010306 general physicsCondensed Matter Physics01 natural sciencesMathematical PhysicsAtomic and Molecular Physics and Optics3. Good healthdescription
The decays of the isomeric 9/2+ states which have been produced by (d, pγ) and (3He, xnγ) reactions, have been investigated in three N = 89 nuclei. The half-lives have been determined to be 5.1 ± 0.3 ns in 149Nd and 3.5 ± 0.4 μs in 153Gd. In 155Dy a 5.5 ns half-life was found, but we were unable to assign it to the 9/2+ state. The calculated E1 transition probability from the 9/2+ state has been used as a probe in suggesting the following main components for the lowest-lying 7/2- state: 7/2 5/2-[523] in 149Nd, 7/2 3/2-[521] in 153Gd and 7/2 3/2-[521] in 155Dy. The corresponding 7/2- state in 151Sm is proposed to be 7/2{1}3/2-[532] + 5/2-[523]{1}. All calculations have been performed using a particle-rotor model with a nonspheroidal Woods-Saxon potential.
year | journal | country | edition | language |
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1979-07-01 | Physica Scripta |