Signatures of enhanced octupole correlations at high spin in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Nd</mml:mi><mml:mprescripts /><mml:none /><mml:mn>136</mml:mn></mml:mmultiscripts></mml:math>

Petrache, C. M.; Minkov, N.; Nakatsukasa, Takashi; Lyu, Bo; Astier, A.; Dupont, E.; Zheng, Kaikai; Greenlees, P. T.; Badran, H.; Calverley, T.; Cox, D. M.; Grahn, T.; Hilton, J.; Julin, R.; Juutinen, S.; Konki, J.; Pakarinen, J.; Papadakis, P.; Partanen, J.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Scholey, C.; Sorri, J.; Stolze, S.; Uusitalo, J.; Cederwall, B.; Ertoprak, A.; Liu, H.; Guo, S.; Liu, M. L.; Wang, J. G.; Zhou, X. H.; Kuti, I.; Tímár, J.; Tucholski, A.; Srebrny, J.; Andreoiu, C.

doi:10.1103/physrevc.102.014311

Cited by 5 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measured values for Ba nuclei are smaller than those in the Xe nuclei, have values similar to those of the negative-parity bands in other neighboring nuclei (see, e.g., Ref. [32]), and exhibit a slight decrease with decreasing neutron number. This is surprising, because intuitively one would expect an increase of the octupole correlations when the neutron number decreases towards the N = 56 magic number for octupole correlations.…”

Section: Possible Octupole Correlationssupporting

confidence: 70%

“…The calculated octupole softness in the β 2 -β 3 plane and the high B(E 1)/B(E 2) values can be induced by the used density functional, but can also correspond to higher-lying negative-parity bands, which are yet unobserved experimentally. The 112-122 Ba and [110][111][112][113][114][115][116][117][118][119][120] Xe spectra can also be checked for octupole collectivity by the collective quadrupole-octupole rotation model (QORM) [34], as recently done for 136 Nd [32], in which enhanced octupole correlations were observed at high spin. The energy spectra are well reproduced [35], which suggests the possible existence of octupole collectivity.…”

Section: Possible Octupole Correlationsmentioning

confidence: 99%

See 1 more Smart Citation

Refined description of the positive-parity bands and the extent of octupole correlations in Ba120

Lyu¹,

Petrache²,

Zheng³

et al. 2022

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

Three new negative-parity bands have been identified in 120 Ba, two of them forming a strongly coupled band. The previously known negative-parity band is significantly extended to high spin, while the lower part of the yrare positive-parity band has been modified. From the analysis of the band properties and comparison with the neighboring nuclei a coherent description of all bands is achieved. In particular, a simple explanation of the evolution of the positive-parity bands at high spin is proposed, including the possible occupation of the ν f 7/2 [541]1/2 − intruder orbital. Cranked Nilsson-Strutinsky calculations reveal similar quadrupole deformations but different triaxiality of the bands, while particle number conserving cranked shell model calculations qualitatively reproduce the experimental data and support the assigned configurations. The new measured ratios of reduced transition probabilities B(E 1)/B(E 2) complete the systematics in the [118][119][120][121][122][123][124] Ba nuclei, exhibiting a decrease with decreasing neutron number, and are compared with the known values in the [116][117][118][119][120] Xe nuclei, which are larger. Extended calculations with the quadrupole and octupole collective Hamiltonian based on the relativistic Hartree-Bogoliubov model employing the relativistic DD-PC1 density functional nicely reproduce the decreasing trend towards lower neutron numbers for Ba and Xe nuclei, as well as the larger values in Xe nuclei, but are much larger in amplitude than the experimental values. On the other hand, particle number conserving cranked shell model calculations without octupole deformation overestimate the low-spin values, while those with octupole deformation included reproduce the experimental values in 120 Ba, suggesting the possible existence of moderate octupole collectivity in the negative-parity bands of nuclei in this mass region.

show abstract

Section: Possible Octupole Correlationssupporting

confidence: 70%

Section: Possible Octupole Correlationsmentioning

confidence: 99%

Refined description of the positive-parity bands and the extent of octupole correlations in Ba120

Lyu¹,

Petrache²,

Zheng³

et al. 2022

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…(For details on the model formalism and its application see [4].) Recently the model was applied to probe the octupole collectivity in light 130−136 Nd [7] showing a capability to indicate enhanced octupole collectivity with signs of a stable QO mode in 136 Nd [8] and softer QO degrees of freedom in the remaining isotopes. It was shown that the model gradually reaches the limiting case of a transition between rigid and soft QO modes with the latter being described by another version called coherent quadrupoleoctupole model (CQOM) [9,10].…”

Section: Qorm and Alternating-parity Bands Structurementioning

confidence: 99%

“…The parameters of the fits are not given for simplicity and are available from the author upon request. Here we can only say that the obtained values are in the ranges typical for the other applications of the model [4,[6][7][8].…”

Section: Alternating-parity Bands In 118-124 Bamentioning

confidence: 99%

Test for Octupole Collectivity in Light Barium Isotopes

Minkov¹

2021

Bulg.J.Phys.

Self Cite

View full text Add to dashboard Cite

This work explores the structure of yrast alternating-parity spectra of the light even-even Barium isotopes 118−124 Ba within a collective quadrupole-octupole rotation model (QORM). The model analysis of the band-structure and parity-shift effects in these nuclei indicates the persisting manifestation of octupole collectivity away from the double "octupole magicity" (Z = 56, N = 88) and suggests that it may still govern the shape dynamics in the low Barium masses. On the other hand it is realized that different effects stemming from the intrinsic shell structure and the dominance of quadrupole deformation may have a competing role emphasizing on the need for further more detailed study of this mass region.

show abstract

“…The band structure of 136 Nd is very rich, exhibiting multiple chiral bands, octupole bands, highly deformed bands, as well as oblate bands, see Refs. [33][34][35][36][37][38][39][40][41][42][43][44]. Of particular interest here are the even-and odd-spin two-quasiparticle bands with the π h 2 11/2 configuration which have been recently investigated in detail with the triaxial projected shell model, proposing their interpretation in terms of transverse wobbling motion [44].…”

Section: Introductionmentioning

confidence: 99%

Experimental evidence for transverse wobbling bands in Nd136

Lyu¹,

Petrache²,

Budaca³

et al. 2022

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

The nature of two high-spin bands in 136 Nd built on the two-quasiparticle configuration π h 2 11/2 , predicted by the triaxial projected shell model as good candidates of transverse wobbling bands, are investigated experimentally. The mixing ratio of one I = 1 transition connecting the one-phonon and the zero-phonon wobbling bands is established from a high-statistics JuroGam II γ -ray spectroscopy experiment by using the combined angular correlation and linear polarization method. The resulting wobbling excitation energy and ratios of reduced electromagnetic transition probabilities are in good agreement with results of a new particle-rotor model which rigidly couples the total angular momentum of two quasiparticles to a triaxial core in an orthogonal geometry, confirming thus the transverse wobbling nature of the bands.

show abstract

Signatures of enhanced octupole correlations at high spin in Nd136

Cited by 5 publications

References 32 publications

Refined description of the positive-parity bands and the extent of octupole correlations in Ba120

Refined description of the positive-parity bands and the extent of octupole correlations in Ba120

Test for Octupole Collectivity in Light Barium Isotopes

Experimental evidence for transverse wobbling bands in Nd136

Contact Info

Product

Resources

About