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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
General properties of the πh9/2[541]1/2- configuration and level scheme of 165Tm
Nuclear Physics A, Volume 695, No. 1-4, Year 2001
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Description
165Tm has been studied through the reactions 150Nd(19F,4n), Ebeam=85 MeV and 154Sm (15N,4n), Ebeam=70 MeV. The level scheme has been extended to spin 71/2-ℏ, and four new bands have been added. Two are assigned to the K=17/2, three-quasiparticle configurations, π[523]7/2-⊗ν[642]5/2 +⊗ν[523]5/2- and π[404]7/2+⊗ν[642]5/2 +⊗ν[523]5/2-, and the remaining two are assigned to γ-vibrations coupled to an h9/2 proton. Lifetimes of high-spin states in the [541]1/2- and [411]1/2+ bands have been measured using DSAM techniques, allowing transition quadrupole moments to be deduced. Furthermore, crossings between the [541]1/2- and [523]7/2- bands and between the [411]1/2+ and [404]7/2+ bands are analysed with a band-mixing calculation to obtain the quadrupole moments of the [523]7/2- and [404]7/2+ bands. While the [523]7/2-, [411]1/2+ and [404]7/2+ bands all have similar deformations, the [541]1/2- band has a quadrupole moment approximately 15% larger. The relative deformations are in good agreement with diabatic potential energy surface calculations performed using the code "Ultimate Cranker". The experimental crossing frequency, due to the alignment of i13/2 neutrons, is found to be delayed in the [541]1/2- band compared to the other bands. This is a universal feature in the rare-earth region, and extensive systematic Cranked Shell Model calculations have been performed to predict deformations and crossing frequencies for nuclei in the region. The model is unable to reproduce the full delay in crossing frequency, confirming that deformation alone is not responsible for the shift. © 2001 Elsevier Science B.V.
Authors & Co-Authors
Bark, Robert A.
Denmark, Copenhagen
Københavns Universitet
Australia, Canberra
The Australian National University
Hagemann, Gudrun B.
Denmark, Copenhagen
Københavns Universitet
Bearden, Ian Gardner
Denmark, Copenhagen
Københavns Universitet
Leoni, Silvia
Italy, Milan
Università Degli Studi Di Milano
Lönnroth, Tom
Finland, Turku
Åbo Akademi University
Reviol, Walter
United States, Knoxville
The University of Tennessee, Knoxville
Riedinger, Lee L.
United States, Knoxville
The University of Tennessee, Knoxville
Wrzesiński, J.
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Statistics
Citations: 43
Authors: 8
Affiliations: 7
Identifiers
Doi:
10.1016/S0375-9474(01)01111-3
ISSN:
03759474