Observation and Quadrupole-Moment Measurement of the First Superdeformed Band in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">A</mml:mi><mml:mi /><mml:mi>∼</mml:mi><mml:mi /><mml:mn>60</mml:mn></mml:math>Mass Region

Svensson, C. E.; Baktash, C.; Cameron, J. A.; Devlin, M.; Eberth, J.; Flibotte, Stéphane; Haslip, D. S.; LaFosse, D. R.; Lee, I. Y.; Macchiavelli, A. O.; MacLeod, R. W.; Nieminen, J. M.; Paul, S. D.; Riedinger, L. L.; Rudolph, Dirk; Sarantites, D. G.; Thomas, H. G.; Waddington, J. C.; Weintraub, W.; Afanasjev, A. V.; Ragnarsson, I.

doi:10.1103/physrevlett.79.1233

Cited by 92 publications

(75 citation statements)

References 21 publications

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“…III). Figure 7(c) extends the I x vs ω comparison further with selected bands in 60 Zn (SD in [53]), 61 Zn (SD in [54]), 62 Zn (SD in [55] and SD1 in [56]), and 65 Zn (SD1 in [52]). Since the 65 Zn SD1 band has not yet been firmly linked to the lowerlying states, the spin value of 33/2 proposed by Yu et al [52] for the bandhead was adopted.…”

Section: Nimentioning

confidence: 82%

“…From the discussion above, it is clear that an interpretation within the framework adopted for the description of most of the collective bands observed in the Ni [32,33,35,37,39,41] and Zn [52][53][54][55][56] isotopic chains is warranted. Hence, calculations were performed within the configuration-dependent cranked Nilsson-Strutinsky (CNS) model with the formalism described in Refs.…”

Section: B Interpretation From Cranked Nilsson-strutinsky Calculationsmentioning

confidence: 99%

“…7. (Color online) Spin along the rotational axis I x vs rotational frequency ω for (a) bands D1, D2, and D3 in 63 Ni and the ground-state band in 60 Fe (GSB in [21]); (b) selected rotational bands in 56 Ni (SD2 in [32,33]), 57 Ni (SD1 in [34,35]), 58 Ni (B3 in [37]), 59 Ni (B2 in [39]), and 60 Ni (W D2 in [41]) together with the trajectory of the yrast band in 60 Fe in the I = 8-20 range, where this sequence is associated with a configuration with two aligned g 9/2 neutrons; (c) same as (b), but for selected bands in 60 Zn (SD in [53]), 61 Zn (SD in [54]), 62 Zn (SD in [55] and SD1 in [56]), and 65 Zn (SD1 in [52]). See text for details.…”

Section: B Interpretation From Cranked Nilsson-strutinsky Calculationsmentioning

confidence: 99%

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Single-particle and collective excitations in63Ni

et al. 2013

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Single-particle and collective excitations in Ni-63Albers, M.; Zhu, S.; Janssens, R. V. F.; Gellanki, Jnaneswari; Ragnarsson, Ingemar; Alcorta, M.; Baugher, T.; Bertone, P. F.; Carpenter, M. P.; Chiara, C. J.; Chowdhury, P.; Deacon, A. General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Ca,2α3nγ ) 63 Ni reaction at beam energies between 275 and 320 MeV. Three collective bands, built upon states of single-particle character, were identified. For two of the three bands, the transition quadrupole moments were extracted, herewith quantifying the deformation at high spin. The results have been compared with shell-model and cranked Nilsson-Strutinsky calculations. Despite the Z = 28 shell closure and the approach to the purported N = 40 subshell, the 63 Ni isotope is able to sustain collective excitations at moderate and high spin.

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Section: Nimentioning

confidence: 82%

Section: B Interpretation From Cranked Nilsson-strutinsky Calculationsmentioning

confidence: 99%

Section: B Interpretation From Cranked Nilsson-strutinsky Calculationsmentioning

confidence: 99%

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Single-particle and collective excitations in63Ni

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“…[5,6,7,8,9,10]). One of the main goals is to understand which changes of the single-particle orbitals are involved on going from one SD band to another and how they affect physical observables, like dynamic moments of inertia J (2) , charge quadrupole moments Q 0 etc. The theoretical analysis of the underlying structure of two SD bands in two neighboring nuclei, differing by the occupation of one single-nucleonic orbital, provides a less model dependent comparison compared with the one among bands which differ in occupation by several nucleonic orbitals.…”

Section: Introductionmentioning

confidence: 99%

Relativistic mean field theory in rotating frame: Single-particle properties at superdeformation

1998

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Single-particle properties at superdeformation are investigated within the Cranked Relativistic Mean Field (CRMF) theory on the example of superdeformed rotational bands observed in the A ∼ 140 − 150 mass region. Applying the effective alignment approach it is shown that CRMF theory provides a reasonable description of the alignment properties of the single-particle orbitals. The agreement with experiment is good in most of the cases. This suggests that many features of the observed superdeformed bands can be well understood in terms of an almost undisturbed single-particle motion. The stability of the results with respect to the parameterizations used in Relativistic Mean Field (RMF) theory is also investigated, employing some frequently used non-linear effective forces. It turns out, with the exception of the single-particle ordering in superdeformed minimum, that the dependence of the calculated observables on the parameterization is rather small.

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“…[6,9] highlighted the role of cross-shell proton excitations, at least for the understanding of neutron-rich Ni isotopes. Indeed, the importance of particles in orbitals of 0g 9/2 character and, maybe even more, of holes in the 0f 7/2 core orbitals was pointed out already when collective high-spin bands were first observed in the A = 60 region [32][33][34][35]. A few years later, it was concluded [36] that, for low-spin states in configurations of the 59 Cu nucleus, both the spectroscopic quadrupole moment and the quadrupole deformation increase linearly with q = q 1 + q 2 , where q 1 is the total number of f 7/2 holes and q 2 is the total number of g 9/2 particles.…”

Section: Introductionmentioning

confidence: 99%

Single-particle and collective excitations inNi62

et al. 2016

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Background: Level sequences of rotational character have been observed in several nuclei in the A = 60 mass region. The importance of the deformation-driving πf 7/2 and νg 9/2 orbitals on the onset of nuclear deformation is stressed. Purpose: A measurement was performed in order to identify collective rotational structures in the relatively neutron-rich 62 Ni isotope. Method:The 26 Mg( 48 Ca,2α4nγ) 62 Ni complex reaction at beam energies between 275 and 320 MeV was utilized. Reaction products were identified in mass (A) and charge (Z) with the Fragment Mass Analyzer (FMA) and γ rays were detected with the Gammasphere array. Results: Two collective bands, built upon states of single-particle character, were identified and sizable deformation was assigned to both sequences based on the measured transitional quadrupole moments, herewith quantifying the deformation at high spin. Conclusions: Based on Cranked Nilsson-Strutinsky calculations and comparisons with deformed bands in the A = 60 mass region, the two rotational bands are understood as being associated with configurations involving multiple f 7/2 protons and g 9/2 neutrons, driving the nucleus to sizable prolate deformation.

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Observation and Quadrupole-Moment Measurement of the First Superdeformed Band in theA∼60Mass Region

Cited by 92 publications

References 21 publications

Single-particle and collective excitations in63Ni

Single-particle and collective excitations in63Ni

Relativistic mean field theory in rotating frame: Single-particle properties at superdeformation

Single-particle and collective excitations inNi62

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