Structure changes in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Er</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>160</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>from low to ultrahigh spin

Ollier, J.; Simpson, John; Riley, M. A.; Paul, E. S.; Wang, X.; Aguilar, A.; Carpenter, M. P.; Darby, I. G.; Hartley, D. J.; Janssens, R. V. F.; Kondev, F. G.; Lauritsen, T.; Nolan, P. J.; Petri, M.; Rees, J. M.; Rigby, S. V.; Teal, C.; Thomson, James A.; Unsworth, C.; Kardan, A.; Ragnarsson, I.

doi:10.1103/physrevc.83.044309

Cited by 25 publications

(11 citation statements)

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“…The phenomenal progress achieved in the experimental techniques in recent years has made it possible to probe the nuclear structure properties at the extremes of spin and isospin. In some heavier nuclei, more than thirty band structures have been identified and some of these bands extend up to angular-momentum of sixty [2][3][4][5]. The band structures provide valuable information on the dependence of nuclear properties on excitation energy and angular-momentum.…”

Section: Introductionmentioning

confidence: 99%

Quasiparticle and γ -band structures in Dy156

et al. 2018

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Excited band structures recently observed in 156 Dy are investigated using the microscopic triaxial projected shell model (TPSM) approach and the quasiparticle random phase approximation (QRPA) based on the rotating mean-field. It is demonstrated that new observed excited bands, tracking the ground-state band, are the γ-bands based on the excited two-quasineutron configurations as conjuctured in the experimental work.

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Section: Introductionmentioning

confidence: 99%

Quasiparticle and γ -band structures in Dy156

et al. 2018

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“…A spectacular example of a γ band built on sequential alignments has been found in 160 Er by Ollier et al [47]. Only the odd spin members of the γ band are seen, but they extend up to spin 43 + and track the yrast states around both the υ(i13/2) 2 AB neutron alignment and then around the π(h11/2) 2 proton alignment (second back-bend).…”

Section: Ex(nβnγik) = ħωβ(Nβ + ½) + ħωγ(2nγ + ½|K| + 1) + [I(i + 1) -mentioning

confidence: 82%

No Low-Lying Nuclear Vibrations: Configuration Dependent Pairing and Axial Asymmetry

Sharpey-Schafer¹

2016

Proceedings of 54th International Winter Meeting on Nuclear Physics — PoS(BORMIO2016)

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The present wealth of experimental data on the structure of deformed atomic nuclei challenges the original interpretation by Bohr and Mottelson of low-lying excited K π = 0 + and K π = 2 + rotational bands as β and γ time-dependent vibrations of the quadrupole shape. It is shown that the first excited K π = 02 + bands are pairing isomers with seniority zero lowered into the pairing gap by configuration dependent pairing to form a second vacuum (SV) analogous to the ground state vacuum. These bands are 2p-2h single particle configurations and have nothing to do with nuclear "vibrational collectivity". In contrast, the first excited K π = 2 + bands, that are found in all quadrupole deformed nuclei, are collective and exist as a consequence of the breaking of axial symmetry.

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“…38,39 Quite recently, a number of new data suggesting appearance of γ-vibrations (shape fluctuation modes toward triaxial deformation) at high spin have been reported. 40,41 Appearance of triaxial deformation at high spin due to the weakening of the pairing correlation has been discussed for a long time, but it is only recent years that a variety of experimental data unambiguously indicating the triaxial deformation has been obtained. New rotational modes appearing when the mean field breaks the axial symmetry, called wobbling motions, have been discovered.…”

Section: Vibrational Modes At High Angular Momentummentioning

confidence: 99%

BCS-Pairing and Nuclear Vibrations

Matsuyanagi

Hinohara

Sato

2013

Fifty Years of Nuclear BCS

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On the basis of time-dependent mean-field picture, we discuss the nature of the low-frequency quadrupole vibrations from small-amplitude to large-amplitude regimes as representatives of surface shape vibrations of a superfluid droplet (nucleus). We consider full five-dimensional quadrupole dynamics including three-dimensional rotations restoring the broken symmetries as well as axially symmetric and asymmetric shape fluctuations. We show that the intimate connections between the BCSpairing and collective vibrations reveal through the inertial masses governing their collective kinetic energies.

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Structure changes inEr160from low to ultrahigh spin

Cited by 25 publications

References 50 publications

Quasiparticle and γ -band structures in Dy156

Quasiparticle and γ -band structures in Dy156

No Low-Lying Nuclear Vibrations: Configuration Dependent Pairing and Axial Asymmetry

BCS-Pairing and Nuclear Vibrations

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