Quadrupole moment measurements of TSD1 and TSD2 bands in<sup>167</sup>Lu

Gürdal, G.; Amro, H.; Beausang, C. W.; Brenner, D. S.; Carpenter, M. P.; Casten, R. F.; Engelhardt, C.; Hagemann, G.B.; Hansen, Christian Rønn; Hartley, D. J.; Herskind, B.; Hübel, H.; Khoo, T. L.; Lauritsen, T.; C, W; Meyer, D. A.; Moore, E. F.; Bringel, P.; Roux, D. G.; Sletten, G.; Yadav, R.B.; Y, Zhang

doi:10.1088/0954-3899/31/10/091

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…The cranking formalism has predicted pronounced minima around (ε 2 ,γ ) ∼ (0.4,20 • ) which are caused by shell gaps for proton numbers Z = 71 and 72, and neutron numbers N = 94 and 97 [40,48]. The observed markedly enhanced transition quadrupole moments of the TSD bands comparing with the ND bands in 163,164,165 Lu [49][50][51][52] shows that these bands have an enhanced deformation. Furthermore, the wobbling bands observed in 163,165,167 Lu and possibly 161 Lu can only be formed at triaxial deformation.…”

Section: E Tsd Bandsmentioning

confidence: 99%

Interpretation of the high spin states inLu161: A paired and unpaired study

Carlsson

Ragnarsson

et al. 2014

Phys. Rev. C

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A paired cranked Nilsson-Strutinsky-Bogoliubov (CNSB) model is presented, which employs the same method to calculate the liquid-drop energy and moment of inertia as the unpaired cranked Nilsson-Strutinsky (CNS) model. In the CNSB model, the energy minimization is carried out in the mesh of pairing gaps and Fermi levels λ as well as deformation parameters. The high spin states in 161 Lu are then investigated with the CNSB and CNS models. The terminating structure shows a striking similarity with these two models. Combining the CNSB and CNS models, a complete understanding of high spin structures, including the normal deformed (ND) and triaxial strongly deformed (TSD) bands and observed side bands in 161 Lu, is achieved. It appears that the only important paired crossings are the first i 13/2 neutron crossing and the first h 11/2 proton crossing. For the description of the unpaired high spin crossings, it is important to be able to distinguish between the pseudospin partners in the proton N = 4 shell, (d 5/2 ,g 7/2 ) and (d 3/2 ,s 1/2 ). The yrast bands are predicted to terminate, which explains the structure of a TSD-like band X2. A band crossing at I ≈ 36.5 for the TSD band in 161 Lu, unique within the chain of even-N Lu isotopes, is well described by the CNSB model.

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Section: E Tsd Bandsmentioning

confidence: 99%

Interpretation of the high spin states inLu161: A paired and unpaired study

Carlsson

Ragnarsson

et al. 2014

Phys. Rev. C

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“…Measurements of the life-times in the TSD band and the yrast ND band have been presented [58,59]. However, these life-times are associated with large uncertainties and appear somewhat confusing when compared with the present calculations.…”

Section: Discussionmentioning

confidence: 72%

“…Finally, the experimental value of Qt for the TSD1 band is shown. It is obtained as an average over the most intense transitions, see [59].…”

Section: The 541 Bands At Higher Energymentioning

confidence: 99%

Interpretation of normal-deformed bands in Lu167

et al. 2020

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With the aim to get a general understanding of rotational bands in the deformed rare-earth region or in deformed nuclei in general, the observed normal-deformed rotational structures in 167 Lu are interpreted within the unpaired and paired cranked Nilsson-Strutinsky formalisms, CNS and CNSB. Particular attention is devoted to the band crossings. For this nucleus with the Fermi surface high up in the h 11/2 shell, we conclude that except for the paired AB and BC crossings in configurations with an even and odd number of i 13/2 neutrons, respectively, the observed band crossings can be understood within the unpaired formalism. Especially, it means that above the AB and BC crossings, the evolution with spin is described as a gradual alignment of the spin vectors of the particles outside closed shells. Consequently, the configurations can be characterized by the number of particles occupying open j-shells or groups of j-shells. In the present study, we revise the interpretation of some experimental bands and also the nature of the crossings while some previous configuration assignments are confirmed.

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“…It is found that typical values for normal deformed bands fall in the range 6-7 eb [40,41], while the values for the strongly deformed bands in [168][169][170][171][172][173][174] Hf fall in the range fall in the range 11-14 eb. The TSD1 bands in 165,167 Lu do also fall in the range 6-7 eb [42,43], indicating that they have a similar deformation as the ND bands. The values for the TSD1 band in 163 Lu are lower than the early measurements [2] but appear somewhat higher than in 165,167 Lu.…”

Section: Measured Transition Quadrupole Moments Q Tmentioning

confidence: 89%

How deformed are the TSD bands in odd Lu isotopes?

Ragnarsson¹

2017

Phys. Scr.

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The experimental fingerprints for large deformation in the triaxial strongly deformed (TSD) bands of 163,165,167Lu are discussed. It is argued that these fingerprints are not very convincing. On the contrary, especially the fact that there exist strong interactions between the TSD bands and normal-deformed (ND) bands indicates that the deformation of the TSD bands cannot be very different from that of the ND bands. The need for detailed new experimental data is underlined.

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Quadrupole moment measurements of TSD1 and TSD2 bands in¹⁶⁷Lu

Cited by 8 publications

References 10 publications

Interpretation of the high spin states inLu161: A paired and unpaired study

Interpretation of the high spin states inLu161: A paired and unpaired study

Interpretation of normal-deformed bands in Lu167

How deformed are the TSD bands in odd Lu isotopes?

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Quadrupole moment measurements of TSD1 and TSD2 bands in167Lu

Cited by 8 publications

References 10 publications

Interpretation of the high spin states inLu161: A paired and unpaired study

Interpretation of the high spin states inLu161: A paired and unpaired study

Interpretation of normal-deformed bands in Lu167

How deformed are the TSD bands in odd Lu isotopes?

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Quadrupole moment measurements of TSD1 and TSD2 bands in¹⁶⁷Lu