Backbending in 167Hf and 168Hf and the band-crossing picture

Janssens, R. V. F.; Voigt, M.J.A. de; Sakai, Hisakazu; Aarts, H.J.M.; Poel, C.J. van der; Arciszewski, H.F.R.; Scherpenzeel, D.E.C.; Vervier, J.

doi:10.1016/0370-2693(81)90260-4

Cited by 17 publications

(4 citation statements)

References 11 publications

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“…[16], two coupled ∆I = 1 rotational bands with spins up to 22h and 20h were identified and configurations were proposed based upon the fact that (i) the yrast band in the odd-Z neighbor 167 Ta (also studied in Ref. [16]) is built on a h 11/2 proton and that (ii) a νi 13/2 structure is yrast in 167 Hf (odd-N neighbor) [20]. In 167 Ta, a strong πd 5/2 band has also been observed.…”

Section: Resultsmentioning

confidence: 99%

Multi-quasiparticle structures up to spin~44ℏin the odd-odd nucleusTa
Wang
¹
,
Hartley²,
Riley³
et al. 2010
Phys. Rev. C
5
4
2
0
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High-spin states in the odd-odd nucleus 168 Ta have been populated in the 120 Sn( 51 V,3n) reaction. Two multi-quasiparticle structures have been extended significantly from spin ∼ 20h to above 40h. As a result, the first rotational alignment has been fully delineated and a second band crossing has been observed for the first time in this nucleus. Configurations for these strongly-coupled rotational bands are proposed based on signature splitting, B(M 1)/B(E2) ratio information, and observed rotation-alignment behavior. Properties of the observed bands in 168 Ta are compared to related structures in the neighboring odd-Z, odd-N , and odd-odd nuclei and are discussed within the framework of the cranked shell model.

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Section: Resultsmentioning

confidence: 99%

Multi-quasiparticle structures up to spin~44ℏin the odd-odd nucleusTa
Wang
¹
,
Hartley²,
Riley³
et al. 2010
Phys. Rev. C
5
4
2
0
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“…decoupling and spin alignment of an i 13/2 neutron pair from the pairing field [67]. The unsmoothness in J (1) and a small peak in J (2) (Fig.…”

Section: The High-spin Bands In 168 Hf a Observed High-spin Bands In ...mentioning

confidence: 95%

“…Experimental excitation energies relative to a rotating liquid drop energy E rld as a function of spin I, and spin, kinematic 014309-10 [67]. The unsmoothness in J (1) and a small peak in J (2) [Fig.…”

Section: A Observed High-spin Bands In 168 Hfmentioning

confidence: 99%

Interpretation of the large-deformation high-spin bands in selectA=158–168 nuclei

et al. 2012

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The high-spin rotational bands in 168 Hf and the triaxial bands in Lu nuclei are analyzed using the configuration-constrained cranked Nilsson-Strutinsky (CNS) model. Special attention is given to the up-sloping extruder orbitals. The relative alignment between the bands which appear to correspond to triaxial shape is also considered, including the yrast ultrahigh-spin band in 158 Er. This comparison suggests that the latter band is formed from rotation around the intermediate axis. In addition, the standard approximations of the CNS approach are investigated, indicating that the errors which are introduced by the neglect of off-shell matrix elements and the cutoff at nine oscillator shells (N max = 8) are essentially negligible compared to other uncertainties. On the other hand, the full inclusion of the hexadecapole degree of freedom is more significant; for example it leads to a decrease of the total energy of ∼ 500 keV in the triaxial superdeformed (TSD) region of 168 Hf.

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“…The band crossing (backbending) in the paired CNSB yrast bands with the (+, 0) neutron configuration is evident. It is well-known that the rotational alignment of one i 13/2 neutron pair is responsible for this band crossing, which is usually seen in the rotational bands in the rare-earth nuclei in the spin region I = 12 − 16 [52].…”

Section: B Comparison Of Cns and Cnsb Calculationsmentioning

confidence: 95%

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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Backbending in 167Hf and 168Hf and the band-crossing picture

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Cited by 17 publications

References 11 publications

Multi-quasiparticle structures up to spin~44ℏin the odd-odd nucleusTa
Wang
¹
,
Hartley²,
Riley³
et al. 2010
Phys. Rev. C
5
4
2
0
View full text Add to dashboard Cite

Multi-quasiparticle structures up to spin~44ℏin the odd-odd nucleusTa
Wang
¹
,
Hartley²,
Riley³
et al. 2010
Phys. Rev. C
5
4
2
0
View full text Add to dashboard Cite

Interpretation of the large-deformation high-spin bands in selectA=158–168 nuclei

Interpretation of normal-deformed bands in Lu167

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Backbending in 167Hf and 168Hf and the band-crossing picture

Abstract: Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

Cited by 17 publications

References 11 publications

Multi-quasiparticle structures up to spin~44ℏin the odd-odd nucleusTaWang1, Hartley2, Riley3 et al. 2010Phys. Rev. C5420View full textAdd to dashboardCite

Multi-quasiparticle structures up to spin~44ℏin the odd-odd nucleusTaWang1, Hartley2, Riley3 et al. 2010Phys. Rev. C5420View full textAdd to dashboardCite

Interpretation of the large-deformation high-spin bands in selectA=158–168 nuclei

Interpretation of normal-deformed bands in Lu167

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About

Multi-quasiparticle structures up to spin~44ℏin the odd-odd nucleusTa
Wang
¹
,
Hartley²,
Riley³
et al. 2010
Phys. Rev. C
5
4
2
0
View full text Add to dashboard Cite

Multi-quasiparticle structures up to spin~44ℏin the odd-odd nucleusTa
Wang
¹
,
Hartley²,
Riley³
et al. 2010
Phys. Rev. C
5
4
2
0
View full text Add to dashboard Cite