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Svensson, C. E.; Rudolph, Dirk; Baktash, C.; Bentley, M. A.; Cameron, J. A.; Carpenter, M. P.; Devlin, M.; Eberth, J.; Flibotte, Stéphane; Galindo-Uribarri, A.; Hackman, G.; Haslip, D. S.; Janssens, R. V. F.; LaFosse, D. R.; Lampman, T. J.; Lee, I. Y.; Lerma, F.; Macchiavelli, A. O.; Nieminen, J. M.; Paul, S. D.; Radford, D. C.; Reiter, P.; Riedinger, L. L.; Sarantites, D. G.; Schaly, B.; Seweryniak, D.; Thelen, O.; Thomas, H. G.; Waddington, J. C.; Ward, D. R.; Weintraub, W.; Wilson, J. N.; Yu, C. H.; Afanasjev, A. V.; Ragnarsson, I.

doi:10.1103/physrevlett.82.3400

Cited by 97 publications

(42 citation statements)

References 31 publications

(18 reference statements)

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“…One observed SD band is dominating the level scheme of 60 Zn [18]. This band is well described as formed in the Z = N = 30 gap in Fig.…”

Section: Znmentioning

confidence: 62%

“…Very extensive level schemes have also been deduced for 60 Ni [7], 59 Cu [8,9], 61 Cu [10], and 61 Zn [11]. A few bands are seen in 56 Ni [12,13], 57 Ni [14], 59 Ni [15], 58 Cu [16,17], and 60 Zn [18]. Especially the SD bands in 58 Cu and 60 Zn are interesting because of their high relative yield and their well-defined configuration assignments [19].…”

Section: Introductionmentioning

confidence: 99%

“…In some cases, also Skyrme Hartree-Fock [16,18,22,23] or relativistic mean-field calculations [19] have been applied, notably even large-scale shell-model calculations [12,24]. In previous papers, the level schemes of the different nuclei have been studied separately, i.e., with no or little comparison with neighboring nuclei.…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of rotational bands in theA≈60mass region: Modification of Nilsson parameters

et al. 2014

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The large number of high-spin bands that have been observed in A = 56-62 nuclei are analyzed systematically within the cranked Nilsson-Strutinsky approach. Optimized Nilsson single-particle parameters are derived from investigations of energy differences between experimental and calculated rotational bands. Specifically, the relative energies of bands in neighboring nuclei whose configurations differ by having a high-j orbital either filled or empty are analyzed. The level schemes calculated with the new Nilsson parameters are compared with those using standard Nilsson parameters. Some configuration assignments are revised.

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“…One observed SD band is dominating the level scheme of 60 Zn [18]. This band is well described as formed in the Z = N = 30 gap in Fig.…”

Section: Znmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

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Comparative study of rotational bands in theA≈60mass region: Modification of Nilsson parameters

et al. 2014

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“…This conclusion was reinforced by the demonstration that quasiparticle additivity generally does not hold [4]. Superdeformation in the mass-60 region was predicted some years ago [5] and was recently observed [6][7][8]. This is the lightest known region of SD rotational bands and these new bands show very different character from those of the mass-190 nuclei.The mass-60 SD bands are associated with the highest rotational frequencies (hω ≈ 1.8 MeV) observed so far in SD nuclear systems; in contrast, in the SD mass-190 nuclei the maximum rotational frequency is typically 0.4 MeV.…”

mentioning

confidence: 97%

Theoretical Constraints for Observation of Superdeformed Bands in the Mass-60 Region

et al. 1999

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The lightest superdeformed nuclei of the mass-60 region are described using the projected shell model. In contrast to the heaviest superdeformed nuclei where a coherent motion of nucleons often dominates the physics, it is found that alignment of g 9͞2 proton and neutron pairs determines the high spin behavior for superdeformed rotational bands in this mass region. It is predicted that, due to the systematics of shell fillings along the even-even Zn isotopic chain, observation of a regular superdeformed yrast band sequence will be unlikely for certain nuclei in this mass region. PACS numbers: 21.10.Re, 21.60.Cs, 23.20.Lv, 27.50. + e The mass-190 nuclei are the heaviest nuclei known where long-sequence rotational bands associated with the superdeformed (SD) minimum have been observed [1]. In a recent systematic study using the projected shell model (PSM) [2], it was concluded that the role of highj intruder orbitals is suppressed in these nuclei because of strong correlations in the quadrupole field and nonnegligible correlations in the pair field [3]. This conclusion was reinforced by the demonstration that quasiparticle additivity generally does not hold [4]. Superdeformation in the mass-60 region was predicted some years ago [5] and was recently observed [6][7][8]. This is the lightest known region of SD rotational bands and these new bands show very different character from those of the mass-190 nuclei.The mass-60 SD bands are associated with the highest rotational frequencies ͑hv ഠ 1.8 MeV͒ observed so far in SD nuclear systems; in contrast, in the SD mass-190 nuclei the maximum rotational frequency is typically 0.4 MeV. However, the magnitudes of deformation and pairing appear to be comparable in the mass-60 and mass-190 regions. We may expect that the single-particle level density near the N 30 gap is much lower than for heavier nuclei. Thus, there can be substantial fluctuations in shell fillings along an isotopic chain, which could give rise to drastic changes in the single particle and collective behavior. In addition, the maximum spin within the yrast and near-yrast bands in SD mass-60 nuclei is generally much lower than in heavier nuclei (SD bands terminate earlier [9]). These new features lead us to expect complex behavior in this region relative to previously studied SD nuclei.Thus far, the SD bands of the mass-60 nuclei have been explained using mean-field theories (cranked relativistic mean-field theory and cranked Nilsson model [9], or cranked Skyrme-Hartree-Fock method [7]), with complete neglect of pairing correlations. These descriptions reproduce many of the gross features found in these nuclei. However, some interesting questions have not been discussed. For example, why does the observed SD band in 62 Zn [6] consist of only a few g rays, while popula-tion of the SD band in neighboring 60 Zn [8] extends to low spin states? And why has one not seen a SD yrast band at all in 64 Zn [10]? Can one predict spin values for these bands? Can one give a microscopic justification for the complete neg...

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“…The peak of J (2) observed at low spins in 60 Zn has been in the original experimental paper [9] tentatively interpreted as the simultaneous alignment of the T =1 pairs of g 9/2 protons and neutrons, although no calculation supporting such a hypothesis was presented. Together with the discovery of the analogous SD band in 61 Zn [10], where only a small bump of J (2) was observed, the T =0 paired band crossing was proposed as an underlying structure of the 60 Zn band.…”

mentioning

confidence: 98%

T=0neutron-proton pairing correlations in the superdeformed rotational bands around60Zn

Dobaczewski

Dudek

Wyss³

2003

Phys. Rev. C

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The superdeformed bands in 58 Cu, 59 Cu, 60 Zn, and 61 Zn are analyzed within the frameworks of the Skyrme-Hartree-Fock as well as Strutinsky-Woods-Saxon total routhian surface methods with and without the T =1 pairing correlations. It is shown that a consistent description within these standard approaches cannot be achieved. A T =0 neutron-proton pairing configuration mixing of signature-separated bands in 60 Zn is suggested as a possible solution to the problem.

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Decay Out of the Doubly Magic Superdeformed Band in theN=ZNucleusZ60

Cited by 97 publications

References 31 publications

Comparative study of rotational bands in theA≈60mass region: Modification of Nilsson parameters

Comparative study of rotational bands in theA≈60mass region: Modification of Nilsson parameters

Theoretical Constraints for Observation of Superdeformed Bands in the Mass-60 Region

T=0neutron-proton pairing correlations in the superdeformed rotational bands around60Zn

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