Coexisting normal and triaxial superdeformed structures in 165Lu

Schönwaßer, G.; Nenoff, N.; Hübel, H.; Hagemann, G.B.; Bednarczyk, P.; Bracco, A.; Bringel, P.; Chapman, R.; Curien, D.; Domscheit, J.; Herskind, B.; Jensen, David R.; Leoni, S.; Bianco, G. Lo; Ma, W.C.; Maj, A.; Ødegård, S. W.; Petrache, C. M.; Rossbach, D.; Ryde, H.; Singh, A. K.; Spohr, K.

doi:10.1016/j.nuclphysa.2004.02.006

Cited by 25 publications

(11 citation statements)

References 35 publications

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“…These values are similar to those reported by Yu et al [28]. At higher rotational frequencies the alignment pattern is similar to that of [514] 9 2 − bands in other odd-A rare-earth nuclei such as 165 Lu [31], 169 Ta [32], and 171 Ta [35]. In these cases both signatures undergo a gradual increase in alignment above the AB crossing, with the negative signature experiencing the greater increase.…”

Section: Band 14: Gab → Gabcdsupporting

confidence: 89%

“…The EF crossing is expected to contribute a gain of ∼ 3 [46], and is thus more consistent with the modest gain observed in this band. Support for this suggestion is that an EF alignment at a similar frequency was reported for the π[514] 9 2 − band in neighboring 165 Lu [31]. We therefore suggest that the negative signature sequence undergoes an EF crossing, and ends up with an impressive seven-quasiparticle configuration, f ABCDEF .…”

Section: Band 14: Gab → Gabcdsupporting

confidence: 75%

“…18(b)], is to be expected of a low-K structure. Further, the alignment pattern [ Fig [31], 169 Ta (N =96) [32], and 171 Ta (N =98) [35], where it was given the same interpretation. In all cases the favored signature is substantially more aligned than the unfavored partner before the AB crossing.…”

Section: Band 8: C Dmentioning

confidence: 99%

“…Rotational structures built on this deformationdriving proton orbital are observed systematically in the rare-earth nuclei. Examples are found in the Z=71 nuclei 165 Lu [31], 167 Lu [28], 169 Lu [38], 171 Lu [39], and also in several Z=73 nuclei 167 Ta [43], 169 Ta [32], and 171 Ta [35]. Interestingly, they were not observed in the N =92 isotones 163 Lu [9] and 165 Ta [44].…”

Section: Bands 11 and 12: The Wobbling Excitationsmentioning

confidence: 99%

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Toward complete spectroscopy ofLu167

Roux¹,

Ma²,

Hagemann

et al. 2015

Phys. Rev. C

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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.

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Section: Band 14: Gab → Gabcdsupporting

confidence: 89%

Section: Band 14: Gab → Gabcdsupporting

confidence: 75%

Section: Band 8: C Dmentioning

confidence: 99%

Section: Bands 11 and 12: The Wobbling Excitationsmentioning

confidence: 99%

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Toward complete spectroscopy ofLu167

Roux¹,

Ma²,

Hagemann

et al. 2015

Phys. Rev. C

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“…As this quasineutron is normally associated with 6 of alignment, the other two quasiparticles must account for approximately 4 . In many nearby nuclei, a structure interpreted as the πh 11/2 νAE configuration is observed to strongly mix with either the πd 5/2 or πg 7/2 configurations during or just after the AB crossing [26][27][28]. The E label refers to the lowest negativeparity orbital near the Fermi surface, and from 169 W [29], this orbital has approximately 2 of initial alignment.…”

Section: Bandmentioning

confidence: 99%

Multiple band structures in169,170Re: Search for the wobbling mode in169Re, and residual-interaction analysis of structures in
Hartley
¹
,
Janssens
²
,
Riedinger
³

et al. 2013
Phys. Rev. C
12
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5
0
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Although the observation of wobbling was once thought to be possibly confined to lutetium isotopes in N ≈ 94 nuclei, the identification of this exotic collective mode in 167 Ta has raised the question of the role of the proton Fermi surface with regard to this phenomenon. In order to investigate this issue, an experiment was performed to populate high-spin states in the N = 94 nucleus 169 Re. The heavy-ion reaction 55 Mn + 118 Sn was used in conjunction with Gammasphere to detect the emitted γ rays. Over 130 new transitions were added to the 169 Re level scheme, including the first identification of the πi 13/2 rotational sequence in this nucleus. This configuration is the structure on which all known wobbling sequences are based, but no wobbling band was observed, likely due to the fact that the πi 13/2 sequence is located at a relatively high energy in comparison with the other structures found in 169 Re. Nine decay sequences are now established in this nucleus and are described within the context of the cranked shell model. In addition, significant extension of the level scheme of the odd-odd 170 Re nucleus was possible and a discussion of the residual interactions for the πh 9/2 νi 13/2 and πi 13/2 νi 13/2 configurations in this region is given as well.

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