Multiple chiral doublet bands with octupole correlations in reflection-asymmetric triaxial particle rotor model

Abstract

A reflection-asymmetric triaxial particle rotor model (RAT-PRM) with a quasi-proton and a quasi-neutron coupled with a reflection-asymmetric triaxial rotor is developed and applied to investigate the multiple chiral doublet (M$\chi$D) bands candidates with octupole correlations in ${}^{78}$Br. The calculated excited energies, energy staggering parameters, and $B(M1)/B(E2)$ ratios are in a reasonable agreement with the data of the chiral doublet bands with positive- and negative-parity. The influence of the triaxial deformation $\gamma$ on the calculated $B(E1)$ is found to be significant. By changing $\gamma$ from 16${}^{\circ }$ to 21${}^{\circ }$, the $B(E1)$ values will be enhanced and better agreement with the $B(E1)/B(E2)$ data is achieved. The chiral geometry based on the angular momenta for the rotor, the valence proton and valence neutron is discussed in details.

17 pages, 5 figures

References in corpus (34)

• New parametrization for the nuclear covariant energy density functional with point-coupling interaction
• Multi chiral-doublets in one single nucleus
• Progress on tilted axis cranking covariant density functional theory for nuclear magnetic and antimagnetic rotation
• Chirality of nuclear rotation
• Potential Energy Surfaces of Actinide Nuclei from a Multi-dimensional Constraint Covariant Density Functional Theory: Barrier Heights and Saddle Point Shapes
• Multidimensionally-constrained relativistic mean field models and potential energy surfaces of actinide nuclei
• Antimagnetic Rotation Band in Nuclei: A Microscopic Description
• Novel structure for magnetic rotation bands in 60Ni
• From chiral vibration to static chirality in ^{135}Nd
• Chirality in odd-$A$ nucleus ${}^{135}$Nd in particle rotor model
• Chiral bands for quasi-proton and quasi-neutron coupling with a triaxial rotor
• Open Problems in Understanding the Nuclear Chirality
• Critical frequency in nuclear chiral rotation
• Description of Chiral Doublets in $A\sim 130$ Nuclei and the Possible Chiral Doublets in $A\sim 100$ Nuclei
• Evidence for Multiple Chiral Doublet Bands in ${}^{133}$Ce
• Rod-shaped Nuclei at Extreme Spin and Isospin
• Multiple chiral doublet bands of identical configuration in 103Rh
• Multiple Chirality in Nuclear Rotation: A Microscopic View
• Nuclear chiral doublet bands data tables
• Nuclear chiral and magnetic rotation in covariant density functional theory
• Nonaxial-octupole Y_{32} correlations in N = 150 isotones from multidimensional constrained covariant density functional theories
• Chiral geometry in symmetry restored states: Chiral doublet bands in 128Cs
• Search for the Skyrme-Hartree-Fock Solutions for Chiral Rotation in N=75 Isotones
• Collective Hamiltonian for chiral modes
• Specific features and symmetries for magnetic and chiral bands in nuclei
• Multiple chiral doublets in four-$j$ shells particle rotor model: five possible chiral doublets in ${}_{60}^{136}$Nd${}_{76}$
• Beyond the Unified Model
• Chiral vibrations in the A=135 region
• Investigation of doublet-bands in ${}^{124,126,130,132}$Cs odd-odd nuclei using triaxial projected shell model approach
• Reexamine the nuclear chiral geometry from the orientation of the angular momentum
• Chiral geometry and rotational structure for ${}^{130}$Cs in the projected shell model
• Examining the chiral geometry in 104Rh and 106Rh
• Two-dimensional collective Hamiltonian for chiral and wobbling modes II: Electromagnetic transitions
• New high-spin structure and possible chirality in ${}^{109}$In

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• Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei with octupole correlations
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• Pseudospin symmetry and octupole correlations for multiple chiral doublets in 131Ba
• Recent progress in multiple chiral doublet bands
• Static quadrupole moments of nuclear chiral doublet bands
• Nuclear chiral rotation induced by superfluidity
• Coexistence of planar and aplanar rotations in ${}^{195}$Tl
• Covariant density functional theory for nuclear chirality in ${}^{135}$Nd
• Coexisting single-particle excitations and octupole correlations in transitional nucleus ${}^{217}\mathbf{Ra}$
• Generator coordinate method for nuclear octupole excitations: status and perspectives
• Ground state and fission properties of even-$A$ uranium isotopes from multidimensionally-constrained relativistic mean field model
• Robustness of chiral symmetry in atomic nuclei with reflection-asymmetric shapes