Publisher’s Note: Wobbling mode in Ta 167 [Phys. Rev. C 80 , 041304 (2009)]

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Excited states in the neutron-deficient nucleus 167 Ta were studied through the 120 Sn( 51 V,4n) reaction. Twelve rotational bands have been observed and the relative excitation energy of each sequence is now known due to the multiple interband connections. Several quasineutron alignments were observed that aided in the quasiparticle assignments of these bands. The resulting interpretation is in line with observations in neighboring nuclei. Trends in the wobbling phonon energy seen in 161,163,165,167 Lu and 167 Ta are also discussed and particle-rotor model calculations (assuming constant moments of inertia) are found to be inconsistent with the experimental data.

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confidence: 99%

“…[4]. The present paper uses the same measurement and addresses the full spectroscopy of 167 Ta including an analysis of the band crossings in the twelve rotational sequences and the B(M1)/B(E2) ratios determined for the strongly coupled bands.…”

mentioning

confidence: 99%

Rotational structures and the wobbling mode inTa167

Hartley¹,

Janssens²,

Riedinger³

et al. 2011

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“…The wobbling excitation mode, an experimental fingerprint for nuclei with stable triaxial shape, was predicted about 40 years ago [1], and has now been identified in 163 Lu [2,3], 165 Lu [4], and 167 Lu [5], possibly in 161 Lu [6], and recently in 167 Ta [7]. In addition, TSD structures based on quasiparticle excitations have also been observed in 163 Lu [8,9], 164 Lu [10], 164 Hf [11], 168 Hf [12,13], and a few neighboring nuclides.…”

Section: Introductionmentioning

confidence: 99%

Toward complete spectroscopy ofLu167

Roux¹,

Ma²,

Hagemann

et al. 2015

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Excited states in 167 Lu were populated in the 123 Sb( 48 Ca,4n) reaction at 203 MeV and decay γ-rays measured using the Gammasphere spectrometer array. Two triaxial strongly deformed bands were identified previously and interpreted as zero-and one-phonon wobbling excitations. As a result of more extensive band search, the level scheme has been considerably extended to include ten new rotational bands, and some 630 γ-ray transitions. A number of interband linking transitions were revealed, so that all but two bands could be connected with each other. Configurations are proposed for all new bands based on measured observables, with the help of Cranked Shell Model calculations. A γ-ray sequence, previously suggested as a triaxial strongly deformed band based on quasiparticle excitations coexisting with the wobbling excitation in the triaxial potential well, has now been determined to be a signature partner of a coupled band, associated with a normal deformed five-quasiparticle configuration. The possibility for two new bands being associated with triaxial deformation is discussed.

“…This orbital has been identified in neighboring Lu isotopes ( 163 Lu [2,3], 165 Lu [4], and 167 Lu [5]), where it drives nuclei to large deformations with significant triaxiality that can produce wobbling. The orbital has also been observed in neighboring Ta isotopes 167 Ta [7], 169 Ta [36], and 171 Ta [32]. In each of these cases, the [660]1/2 + orbital is located higher than the [541]1/2 − one, allowing the latter to align more easily.…”

Section: Discussionmentioning

confidence: 85%

“…The wobbling motion, a characteristic excitation mode of triaxial nuclei [1], has been established in 163,165,167 Lu [2][3][4][5], possibly in 161 71 Lu [6], and very recently in 167 73 Ta [7]. Triaxial strongly deformed (TSD) structures have also been observed in several other neighboring nuclei of the mass A ∼ 160 region, e.g., in 168 Hf [8,9].…”

Section: Introductionmentioning

confidence: 99%

High-spin proton alignments and evidence for a second band with enhanced deformation in171Hf

Zhang

Ijaz

et al. 2012

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High-spin properties of the nucleus 171 Hf were studied through the 128 Te( 48 Ca,5n) reaction. Previously known bands have been extended to significantly higher spins and four new bands have been extracted from these data. The results are discussed within the framework of the cranked shell model aided by a comparison with level structures in the neighboring nuclei. The band crossings at rotational frequencies ∼500 keV are interpreted as caused by the alignments of h 11/2 and h 9/2 proton orbitals. Band ED2 exhibits an alignment pattern similar to that of band ED1 which was reported in a recent paper and proposed to be built upon a second potential energy minimum involving the deformation-driving proton i 13/2 ⊗ h 9/2 configuration. It is likely that band ED2 is also associated with a deformation enhanced with respect to that of the normal deformed structures. Further experimental investigation is needed to ascertain the nature of this band.