Evolving collective structures in the transitional nuclei<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">W</mml:mi><mml:mprescripts /><mml:none /><mml:mn>162</mml:mn></mml:mmultiscripts></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">W</mml:mi><mml:mprescripts /><mml:none /><mml:mn>164</mml:mn></mml:mmultiscripts></mml:math>

Joss, D. T.; Dracoulis, George; Higgins, E.; Lewis, Michael; Thomson, James A.; Lane, G. J.; Page, R. D.; Simpson, John; Bianco, L.; Cederwall, B.; Darby, I. G.; Davidson, Paul; Eeckhaudt, S.; Ertürk, S.; Fabricius, B.; Gómez-Hornillos, M.B.; Grahn, T.; Greenlees, P. T.; Hadinia, B.; Jakobsson, U.; Jones, P.; Julin, R.; Juutinen, S.; Ketelhut, S.; Leino, M.; Nieminen, P.; Nyman, M.; Pakarinen, J.; Paul, E. S.; Peura, P.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sapple, P. J.; Sarén, J.; Scholey, C.; Sorri, J.; Uusitalo, J.

doi:10.1103/physrevc.93.024307

Cited by 9 publications

(6 citation statements)

References 36 publications

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“…Hence band 2 is assigned to be based on the mixed (h 9/2 ) 2 and (h 9/2 , f 7/2 ) two-quasineutron configuration. Similar alignment properties are observed in other nuclei in the N ∼ 90 mass region [43,44,45].…”

Section: Discussionsupporting

confidence: 85%

Single-particle and collective excitations in the transitional nucleus ¹⁶⁶Os

Stolze¹,

Grahn²,

Julin³

et al. 2021

J. Phys. G: Nucl. Part. Phys.

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The mean lifetimes of the lowest energy 2 + , 8 + and 9 − states in 166 Os have been measured using the recoil distance Doppler-shift method in conjunction with a selective recoil-decay tagging technique. These measurements extend studies into the most neutron-deficient mass region accessible to current experimental methods. The B(E2; 2 + → 0 + ) = 7(2) W.u. extracted from these measurements is markedly lower than those observed in the heavier even-mass Os isotopes. The 8 + and 9 − states yield reduced transition probabilities that are consistent with single-particle transitions. While these values may indicate a departure from collective structure, the level scheme and the underlying nuclear configurations can also be interpreted in terms of a simple collective picture. This contrasting behaviour suggests an intriguing dichotomy in the description of heavy transitional nuclei.

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Section: Discussionsupporting

confidence: 85%

Single-particle and collective excitations in the transitional nucleus ¹⁶⁶Os

Stolze¹,

Grahn²,

Julin³

et al. 2021

J. Phys. G: Nucl. Part. Phys.

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“…[31]. We note that cranked PES calculations for several W isotopes have been performed previously and used to assign the band configurations [20,25]. We have compared our results with those obtained from the finite-range droplet model (FRDM) calculations reported in Ref [32].…”

Section: Discussionmentioning

confidence: 96%

“…In this particular case, as was pointed out in Refs. [20,25], there is no observed side feeding to the first excited 2 + state in 162 W. Therefore, it was sufficient to consider only the feeding 4 + → 2 + and depopulating 2 + → 0 + transitions for its lifetime determination, see, e.g., Ref. [26].…”

Section: Methods and Analysismentioning

confidence: 99%

Lifetime measurements of excited states in W162 and W164 and the evolution of collectivity in rare-earth nuclei

Doncel¹,

Cederwall²,

Qi³

et al. 2017

Phys. Rev. C

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“…These are probably associated with the less deformed and "softer" prolate shapes of the N ≈ 88 isotopes, see, for example, Refs. [29,30]. Also, the BC crossing differences in Fig.…”

Section: Data Analysis and Resultsmentioning

confidence: 90%

“…[33]. For these lower deformations and smaller neutron numbers, other possible alignments also begin to play a role [29,30]. At the higher neutron-numbers N 98, the increase seen in the AB and BC crossing frequencies can be attributed to both the increasing deformation of these isotopes and the Fermi surface being close to a large deformed shell gap at N = 98 [34], see Fig.…”

Section: Examination Ofmentioning

confidence: 93%

Backbending, seniority, and Pauli blocking of pairing correlations at high rotational frequencies in rapidly rotating nuclei

Miller¹,

Villafana²,

Riley³

et al. 2019

Phys. Rev. C

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Garrett et al. systematically investigated band-crossing frequencies resulting from the rotational alignment of the first pair of i 13/2 neutrons (AB) in rare-earth nuclei. In that study, evidence was found for an odd-even neutron number dependence attributed to changes in the strength of neutron pairing correlations. The present paper carries out a similar investigation at higher rotational frequencies for the second pair of aligning i 13/2 neutrons (BC). Again, a systematic difference in band-crossing frequencies is observed between odd-N and even-N Er, Yb, Hf, and W nuclei, but in the BC case, it is opposite to the AB neutron-number dependence. These results are discussed in terms of a reduction of neutron pairing correlations at high rotational frequencies and of the effects of Pauli blocking on the pairing field by higher-seniority configurations. Also playing a significant role are the changes in deformation with proton and neutron numbers, the changes in location of single-particle orbitals as a function of quadrupole deformation, and the position of the Fermi surface with regard to the various components of the neutron i 13/2 shell.

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Evolving collective structures in the transitional nucleiW162andW164

Cited by 9 publications

References 36 publications

Single-particle and collective excitations in the transitional nucleus ¹⁶⁶Os

Single-particle and collective excitations in the transitional nucleus ¹⁶⁶Os

Lifetime measurements of excited states in W162 and W164 and the evolution of collectivity in rare-earth nuclei

Backbending, seniority, and Pauli blocking of pairing correlations at high rotational frequencies in rapidly rotating nuclei

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Evolving collective structures in the transitional nucleiW162andW164

Cited by 9 publications

References 36 publications

Single-particle and collective excitations in the transitional nucleus 166Os

Single-particle and collective excitations in the transitional nucleus 166Os

Lifetime measurements of excited states in W162 and W164 and the evolution of collectivity in rare-earth nuclei

Backbending, seniority, and Pauli blocking of pairing correlations at high rotational frequencies in rapidly rotating nuclei

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Product

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Single-particle and collective excitations in the transitional nucleus ¹⁶⁶Os

Single-particle and collective excitations in the transitional nucleus ¹⁶⁶Os