Six-quasiparticle isomer in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Nd</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>140</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Petrache, C. M.; Bark, R. A.; Murray, S.; Fantuzi, M.; Lawrie, E. A.; Lang, S.; Lawrie, J. J.; Maliage, S. M.; Mengoni, D.; Mullins, S. M.; Ntshangase, S. S.; Petrache, D.; Ramashidzha, T. M.; Ragnarsson, I.

doi:10.1103/physrevc.74.034304

Cited by 23 publications

(25 citation statements)

References 30 publications

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“…+ state can be con- + six-quasiparticle isomer [40]. In this reference the configuration π(dg) 4 ⊗ νh 2 was assigned to the isomer, and the 12 − and 13 − states were interpreted as the aligned configurations π(dg) 2 ⊗ νh 1 (sd) 1 .…”

Section: Rpa Calculations For Wobblingmentioning

confidence: 99%

Tilted axis rotation, candidates for chiral bands, and wobbling motion in138Nd

et al. 2012

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High-spin states in138 Nd were investigated using the reaction 94 Zr( 48 Ca,4n), detecting coincident γ-rays with the gasp spectrometer. A rich level scheme was constructed including 4 bands of negative parity at low spins, 8 bands of dipole transitions and 8 bands of quadrupole transitions at medium spins. The Cranked Shell Model and the Tilted Axis Cranking model are used to assign configurations to the observed bands, where zero pairing is assumed. For selected configurations the case of finite pairing is also considered. A consistent notation for configuration assignment is introduced, which applies both for zero and finite pairing. The observed bands are interpreted as rotation around the short and long principal axes (quadrupole bands), as well as around a tilted axis (dipole bands). The dipole bands have an intermediate character, between magnetic and collective electric rotation. A pair of dipole bands are candidates for chiral partners, the first case this property has been identified in an even-even nucleus. The possible existence of the wobbling mode at low deformation and medium spins is discussed. The consistent interpretation of the multitude of observed bands strongly supports the existence of stable triaxial deformation at medium spins in 138 Nd.

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Section: Rpa Calculations For Wobblingmentioning

confidence: 99%

Tilted axis rotation, candidates for chiral bands, and wobbling motion in138Nd

et al. 2012

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“…When λ n = ε 5 , the two bands are nearly degenerate with a constant energy separation of ∼ 200 keV for the spin interval 11 ≤ I ≤ 15 and a gradually increasing energy separation for higher spin. For λ n = ε 4 and ε 3 , the spectra present very similar behavior: (1) at the low spin region I < 14, a slight odd-even staggering with opposite phase can be seen for yrast and yrare bands; (2) only at low spins (I = 9, 11, 12), the energy difference of the yrast and yrare states is smaller than 250 keV; (3) for spin I ≥ 14, the energy differences between yrast and yrare states increase with I, e.g., ∼ 400 keV at I = 14 and ∼ 700 keV at I = 20. For λ n = ε 1 , odd-even staggering becomes more obvious and the two bands are separated by an average energy of ∼ 800 keV.…”

Section: B Energy Spectramentioning

confidence: 60%

“…Originally a pair of ∆I = 1 bands found in 134 Pr with the πh 11/2 ⊗νh 11/2 configuration [2], has been reinterpreted in Ref. [1] as a candidate for chiral doubling.…”

Section: Introductionmentioning

confidence: 99%

Chiral Bands for Quasi-Proton and Quasi-Neutron Coupling With a Triaxial Rotor

Zhang

Wang

et al. 2008

Physics of Unstable Nuclei

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A particle rotor model (PRM) with a quasi-proton and a quasi-neutron coupled with a triaxial rotor is developed and applied to study chiral doublet bands with configurations of a h 11/2 proton and a h 11/2 quasi-neutron. With pairing treated by the BCS approximation, the present quasiparticle PRM is aimed at simulating one proton and many neutron holes coupled with a triaxial rotor. After a detailed analysis of the angular momentum orientations, energy separation between the partner bands, and behavior of electromagnetic transitions, for the first time we find aplanar rotation or equivalently chiral geometry beyond the usual one proton and one neutron hole coupled with a triaxial rotor.

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“…The nuclei around the N = 82 shell closure offer a unique laboratory for the study of the shape coexistence in different spin regions, from low and medium spins where spherical and triaxial shapes compete [1,2]. These nuclei often present isomeric states which have simple multi-quasiparticle configurations and are therefore easier to interpret.…”

Section: Introductionmentioning

confidence: 98%

Spectroscopy of135La

et al. 2013

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The 135 La nucleus has been studied using the fusion-evaporation reaction 124 Sn( 17 N,6n) induced by the 17 N radioactive beam. The level scheme has been constructed from the γ -γ coincidence measurement with an array of 12 HPGe detectors, and the lifetimes of two previously known isomeric states has been deduced. The transitions and their intensities observed in the current work as well as the level scheme derived from them is in agreement with the results of a recently published work. However, our interpretation of the results differs significantly in terms of spin and parity assignments, thus solving various contradictions concerning the configurations of some of the bands discussed in the aforementioned work.

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Six-quasiparticle isomer inNd140

Cited by 23 publications

References 30 publications

Tilted axis rotation, candidates for chiral bands, and wobbling motion in138Nd

Tilted axis rotation, candidates for chiral bands, and wobbling motion in138Nd

Chiral Bands for Quasi-Proton and Quasi-Neutron Coupling With a Triaxial Rotor

Spectroscopy of135La

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