https://doi.org/10.1140/epja/s10050-023-01059-8
Regular Article - Theoretical Physics
The evolution of the chiral symmetry in cesium isotopes
1
College of Physics, Jilin University, 130012, Changchun, China
2
School of Physics, Beihang University, 100191, Beijing, China
Received:
9
April
2023
Accepted:
15
June
2023
Published online:
28
June
2023
Following the reports of candidate chiral doublet bands observed in cesium isotopes, the possible chiral candidates and the evolution of three-dimensional rotation in 
are investigated within the microscopic three-dimensional tilted axis cranking covariant density functional theory (3DTAC-CDFT). By investigating the evolution of the polar angle 
and azimuth angle 
as a function of rotational frequency 
, the transition from the planar rotation to the chiral rotation has been found in 
. The corresponding critical rotational frequency 
of the appearance of chiral aplanar rotation decreases as neutron number increases, which can be attributed to the neutrons in (gd) and (sd) shells having smaller angular momentum components along both the short and long axes, and larger components along medium axis, respectively. In comparison, only planar rotation has been obtained in 
. With these interpretations, the obtained 
and energy spectra as well as B(M1)/B(E2) values show reasonable agreement with the available experimental data. In addition, the evolution of quadrupole deformation 
and triaxial deformation 
are also discussed.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
