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Candidate revolving chiral doublet bands in Cs-119
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- Zheng, K. K. (författare)
- Univ Paris Saclay, CNRS IN2P3, IJCLab, F-91405 Orsay, France.;Chinese Acad Sci, Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China.;Chinese Acad Sci, Inst Modern Phys, Ctr Nucl Matter Sci, Lanzhou 730000, Peoples R China.
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- Petrache, C. M. (författare)
- Univ Paris Saclay, CNRS IN2P3, IJCLab, F-91405 Orsay, France.
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- Cederwall, Bo, 1964- (författare)
- KTH,Kärnfysik
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- Univ Paris Saclay, CNRS IN2P3, IJCLab, F-91405 Orsay, France;Chinese Acad Sci, Key Lab High Precis Nucl Spect, Lanzhou 730000, Peoples R China.;Chinese Acad Sci, Inst Modern Phys, Ctr Nucl Matter Sci, Lanzhou 730000, Peoples R China. Univ Paris Saclay, CNRS IN2P3, IJCLab, F-91405 Orsay, France. (creator_code:org_t)
- 2022-03-20
- 2022
- Engelska.
- Ingår i: European Physical Journal A. - : Springer Nature. - 1434-6001 .- 1434-601X. ; 58:3
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- Two rotational hands are identified in Cs-119, one of which having very similar pattern to that of the strongly-coupled pi g(9/2)[404]9/2(+) band. The properties of the bands with similar patterns extracted from the experimental data are in agreement with a chiral interpretation. Tilted axis cranking covariant density functional theory with pairing correlations and particle-number conserving cranked shell model calculations are employed to determine the deformation and to investigate the band configurations, respectively. It results that the backbending is induced by the rotational alignment of two h(11/2 )protons, whose angular momenta reorient from the short to the intermediate axis, in a plane orthogonal to the angular momentum of the strongly-coupled g(9/2) proton which keeps aligned along the long axis. The total spin points in 3D, inducing the breaking of the chiral symmetry. This is the first observation of candidate chiral bands built on a configuration with three protons, one in the strongly coupled [404]9/2(+) orbital which does not change orientation with increasing rotational frequency, and two in the h(1)(1/)(2) orbital which reorients to the rotation axis. The bands are observed in the transient backbending regime, showing that the chirality in nuclei is a general phenomenon, being robust and present not only in nuclei with nearly maximal triaxiality and pure configurations, but also in nuclei with moderate triaxiality and mixed configurations which gradually evolve from one to three-quasiparticle configurations, like in the backbending region.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Nyckelord
- Nuclear reaction:Ni-58(Zn-64
- 3p)Cs-11(9)
- E=255 MeV
- Measured gamma gamma gamma-coincidences
- E-gamma
- I-gamma
- Anisotropy ratios
- Angular distributions
- Spin and parity
- Model calculation
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- art (ämneskategori)
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- Zhang, Wei
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- Page, R. D.
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