Two quasiparticle wobbling in the even-even nucleus 130Ba

Wang, Y. K.; Chen, F.Q.; Zhao, P. W.

doi:10.1016/j.physletb.2020.135246

Cited by 22 publications

(8 citation statements)

References 36 publications

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“…It was firstly observed in the triaxial strongly deformed bands of 163 Lu [3,4], and later for other neighboring nuclei 161 Lu [5], 165 Lu [6], 167 Lu [7], 167 Ta [8]. Later, experimental evidences of wobbling motion were also reported in other normal deformed nuclei: 105 Pd [9], 130 Ba [10,11], 133 Ba [12], 135 Pr [13,14], and 183 Au [15], where the wobbling energies decrease with increasing spin contrary to theoretical expectations in Ref. [1].…”

Section: Introductionmentioning

confidence: 96%

“…On the theoretical side, the wobbling excitation got extensive descriptions with the particle rotor model (PRM) [16,[21][22][23][24][25][26] and its approximation solutions [27][28][29][30][31][32][33][34][35][36]. In addition, the random phase approximation [37][38][39][40][41][42][43][44][45], the angular momentum projection method [11,14,46], and the collective Hamiltonian method [47][48][49] are used to discuss this issue. However, it should be noted that there are still increasingly loud debates on the transverse wobbling in odd-mass nuclei.…”

Section: Introductionmentioning

confidence: 99%

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Influence of moments of inertia on transverse wobbling mode in odd-mass nuclei

Zhang,

Qi,

Wang

et al. 2022

Preprint

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The reported transverse wobbling band in odd-mass 105 Pd has been reinvestigated by the triaxial particle rotor model. Employing several different parameter sets of moment of inertia (MOI), all of the calculations could be in good agreement with the experimental data, which show distinct modes of rotational excitation, respectively. These modes are sensitive to the ratio between the MOI at intermediate and short axis. With the increase of this ratio, the axis which the total angular momentum wobbles about is changed from the short axis to the intermediate axis. The obtained oscillation modes from calculations are found to be the quantum tunneling between two orientations of angular momentum, which is different from the expected precession. The mechanism of rotational bands in 105 Pd might be a competition between different modes, which show the complexity of the transverse wobbling mode in real odd-mass nuclei.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Influence of moments of inertia on transverse wobbling mode in odd-mass nuclei

Zhang,

Qi,

Wang

et al. 2022

Preprint

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“…The triaxial projected shell model (TPSM) carries out the configuration mixing based on a Nilsson mean field with the angular momentum projection technique [30]. It has been successfully applied to study the nuclear rotational excitations, including the backbending phenomena [31], the superdeformed rotational bands [32], the signature inversion [33], the γ bands [34], and the chiral [35][36][37] and wobbling [38] rotations, etc.…”

Section: Introductionmentioning

confidence: 99%

Nuclear matrix elements of neutrinoless double-$β$ decay in the triaxial projected shell model

Wang,

Zhao,

Meng

2021

Preprint

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The nuclear matrix elements of neutrinoless double-β decay for nuclei 76 Ge, 82 Se, 100 Mo, 130 Te, and 150 Nd are studied within the triaxial projected shell model, which incorporates simultaneously the triaxial deformation and quasiparticle configuration mixing. The low-lying spectra and the B(E2 : 0 + → 2 + ) values are reproduced well. The effects of the quasiparticles configuration mixing, the triaxial deformation, and the closure approximation on the nuclear matrix elements are studied in detail. For nuclei 76 Ge, 82 Se, 100 Mo, 130 Te, and 150 Nd, the nuclear matrix elements are respectively reduced by the quasiparticle configuration mixing by 6%, 7%, 2%, 3%, and 4%, and enhanced by the odd-odd intermediate states by 7%, 4%, 11%, 20%, and 14%. Varying the triaxial deformation γ from 0 • to 60 • for the mother and daughter nuclei, the nuclear matrix elements change by 41%, 17%, 68%, 14%, and 511% respectively for 76 Ge, 82 Se, 100 Mo, 130 Te, and 150 Nd, which indicates the importance of treating the triaxial deformation consistently in calculating the nuclear matrix elements.

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“…Recently, two new bands built on the twoquasiparticle π(h 11/2 ) 2 configuration were reported in even-even nuclei 130 Ba [45], which were lately interpreted as the transverse wobbling bands by PRM [46] and AMP method [47]. However, one notes that the experimental evidence for the wobbling motion based on even-even nu-cleus with zero quasi-particle configuration, namely the originally predicted purely collective form [2], is fragmentary yet.…”

Section: Introductionmentioning

confidence: 99%

Influence of triaxial deformation on wobbling motion in even-even nuclei

Qi,

Zhang,

Wang

et al. 2020

Preprint

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The influence of triaxial deformation γ on the purely collective form of wobbling motion in eveneven nuclei are discussed based on the triaxial rotor model. It is found that the harmonic approximation is realized well when γ = 30 • for the properties of energy spectra and electric quadrupole transition probabilities, while this approximation gets bad when γ deviates from 30 • . A recent data from Coulomb excitation experiment, namely 3 + 1 and 2 + 2 for the 110 Ru are studied and might be suggested as the bandhead of the wobbling bands. In addition, two types of angular momentum geometries for wobbling motion, stemming from different γ values, are exhibited by azimuthal plots.

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Two quasiparticle wobbling in the even-even nucleus 130Ba

Cited by 22 publications

References 36 publications

Influence of moments of inertia on transverse wobbling mode in odd-mass nuclei

Influence of moments of inertia on transverse wobbling mode in odd-mass nuclei

Nuclear matrix elements of neutrinoless double-$β$ decay in the triaxial projected shell model

Influence of triaxial deformation on wobbling motion in even-even nuclei

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