The N = 7 unfavoured superdeformed band in 193Hg; coriolis splitting and neutron shell structure at extreme deformation

Joyce, Malcolm J.; Sharpey‐Schafer, J. F.; Riley, M. A.; Cullen, D. M.; Azaiez, F.; Beausang, C. W.; Clark, R. M.; Dagnall, P.J.; Deloncle, I.; Duprat, J.; Fallon, P.; Forsyth, P.D.; Fotiades, N.; Gale, S.J.; Gall, B.; Hannachi, F.; Harissopulos, S.; Hauschild, K.; Jones, P. M.; Kalfas, C. A.; Korichi, A.; Coz, Y. Le; Meyer, M.; Paul, E. S.; Porquet, M. G.; Redon, N.; Schuck, Carsten; Simpson, John; Vlastou, R.; Wadsworth, R.; Nazarewicz, W.

doi:10.1016/0370-2693(94)01285-7

Cited by 30 publications

(11 citation statements)

References 22 publications

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“…[45]), thus the J (1) 's can be accurately extracted. The ω-dependence of experimental MOIs for series of SD bands [46][47][48] were reproduced very well by the PNC calculations for the CSM with both monopole and quadrupole pairing interactions [29,49,50]. In Nilsson level scheme are taken from [43].…”

Section: Pairing Gaps Of Sd Bandsmentioning

confidence: 86%

Nuclear pairing reduction due to rotation and blocking

et al. 2011

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Nuclear pairing gaps of normally deformed and superdeformed nuclei are investigated using the particle-number conserving (PNC) formalism for the cranked shell model, in which the blocking effects are treated exactly. Both rotational frequency ω-dependence and seniority (number of unpaired particles) ν-dependence of the pairing gap∆ are investigated. For the ground-state bands of even-even nuclei, PNC calculations show that in general∆ decreases with increasing ω, but the ω-dependence is much weaker than that calculated by the number-projected Hartree-FockBogolyubov approach. For the multiquasiparticle bands (seniority ν > 2), the pairing gaps keep almost ω-independent. As a function of the seniority ν, the bandhead pairing gaps∆(ν, ω = 0) decrease slowly with increasing ν. Even for the highest seniority ν bands identified so far,∆(ν, ω = 0) remains greater than 70% of∆(ν = 0, ω = 0).

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Section: Pairing Gaps Of Sd Bandsmentioning

confidence: 86%

Nuclear pairing reduction due to rotation and blocking

et al. 2011

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“…Since the initial discovery of a SD rotational band in 191 Hg [1], more than forty bands have been observed for isotopes of Au, Hg, Tl and Pb (see refs. [2,3,4,5,6,7,8,9,10,11,12] and the earlier papers cited in the compilation of experimental data [13]). The anchor point of the region appears to be the nucleus 192 Hg which corresponds to the SD magic numbers: Z=80 and N=112.…”

Section: Introductionmentioning

confidence: 99%

Superdeformed rotational bands in the mercury region. A cranked Skyrme-Hartree-Fock-Bogoliubov study

Gall

Bonche

Dobaczewski

et al. 1994

Z. Physik A - Hadrons and Nuclei

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153

156

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A study of rotational properties of the ground superdeformed bands in 190 Hg, 192 Hg, 194 Hg, and 194 Pb is presented. We use the cranked Hartree-Fock-Bogoliubov method with the SkM * parametrization of the Skyrme force in the particle-hole channel and a seniority interaction in the pairing channel. An approximate particle number projection is performed by means of the Lipkin-Nogami prescription. We analyze the proton and neutron quasiparticle routhians in connection with the present information on about thirty presently observed superdeformed bands in nuclei close neighbours of 192 Hg.

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“…We also calculate the two interacting SD bands of 193 Hg. Our analysis confirms the superiority of a density-dependent pairing force over a seniority pairing interaction.The dynamical moment of inertia J of most superdeformed (SD) bands observed in nuclei of the A ≃ 190 region are increasing functions of the angular velocity ω [1,2,3,4,5,6,7,8,9,10,11,12,13,14]. The recent discovery by Farris et al,[12] that for the two lowest SD bands in 195 Pb, J is almost constant versus ω is therefore particularly interesting.…”

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confidence: 97%

“…According to most theoretical investigations of the A = 190 region, the neutron qp's which are relevant for neutron numbers above the N = 112 gap are built on the [752]5/2, [512]5/2 and [624]9/2 orbitals [15,16,17,18]. In this letter, we analyze the properties of the SD bands of the two odd-N neighbouring nuclei 195 Pb and 193 Hg [5] which today provide the richest information set on the neutron structure in the A = 190 superdeformed well. Our work is based on the cranked Hartree-Fock-Bogoliubov (HFB) approach which has been shown to reproduce with good accuracy the SD band properties of even nuclei [19,20].…”

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Superdeformed bands of odd nuclei inA=190 region in the quasiparticle picture

Terasaki¹,

Flocard

Heenen³

et al. 1997

Phys. Rev. C

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We study the properties of the superdeformed (SD) bands of 195 Pb and 193 Hg by the cranked Hartree-Fock-Bogoliubov method. Our calculations reproduce the flat behavior of the dynamical moment of inertia of two of the SD bands of 195 Pb measured recently. We discuss possible configuration assignments for the observed bands 3 and 4 of 195 Pb. We also calculate the two interacting SD bands of 193 Hg. Our analysis confirms the superiority of a density-dependent pairing force over a seniority pairing interaction.The dynamical moment of inertia J of most superdeformed (SD) bands observed in nuclei of the A ≃ 190 region are increasing functions of the angular velocity ω [1,2,3,4,5,6,7,8,9,10,11,12,13,14]. The recent discovery by Farris et al.,[12] that for the two lowest SD bands in 195 Pb, J is almost constant versus ω is therefore particularly interesting. In the same nucleus two other bands have been observed which display the usual increasing trend. It appears natural to attempt an explanation of these various behaviors of the SD bands of 195 Pb in terms of their quasiparticle (qp) structure. According to most theoretical investigations of the A = 190 region, the neutron qp's which are relevant for neutron numbers above the N = 112 gap are built on the [752]5/2, [512]5/2 and [624]9/2 orbitals [15,16,17,18]. In this letter, we analyze the properties of the SD bands of the two odd-N neighbouring nuclei 195 Pb and 193 Hg [5] which today provide the richest information set on the neutron structure in the A = 190 superdeformed well. Our work is based on the cranked Hartree-Fock-Bogoliubov (HFB) approach which has been shown to reproduce with good accuracy the SD band properties

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The N = 7 unfavoured superdeformed band in 193Hg; coriolis splitting and neutron shell structure at extreme deformation

Cited by 30 publications

References 22 publications

Nuclear pairing reduction due to rotation and blocking

Nuclear pairing reduction due to rotation and blocking

Superdeformed rotational bands in the mercury region. A cranked Skyrme-Hartree-Fock-Bogoliubov study

Superdeformed bands of odd nuclei inA=190 region in the quasiparticle picture

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