Multiple chiral doublets in four-$j$ shells particle rotor model: five possible chiral doublets in ${}_{60}^{136}$Nd${}_{76}$

Abstract

A particle rotor model, which couples nucleons in four single-$j$ shells to a triaxial rotor core, is developed to investigate the five pairs of nearly degenerate doublet bands recently reported in the even-even nucleus ${}^{136}$Nd. The experimental energy spectra and available $B(M1)/B(E2)$ values are successfully reproduced. The angular momentum geometries of the valence nucleons and the core support the chiral rotation interpretations not only for the previously reported chiral doublet, but also for the other four candidates. Hence, ${}^{136}$Nd is the first even-even candidate nucleus in which the multiple chiral doublets exist. Five pairs of chiral doublet bands in a single nucleus is also a new record in the study of nuclear chirality.

15 pages, 6 figures

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Cited by in corpus (19)

• Multiple chiral doublet bands with octupole correlations in reflection-asymmetric triaxial particle rotor model
• Reexamine the nuclear chiral geometry from the orientation of the angular momentum
• Chirality of ${}^{135}$Nd reexamined: Evidence for multiple chiral doublet bands
• Dynamics of rotation in chiral nuclei
• Behavior of the collective rotor in nuclear chiral motion
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• Static quadrupole moments of nuclear chiral doublet bands
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• Coexistence of planar and aplanar rotations in ${}^{195}$Tl
• Covariant density functional theory for nuclear chirality in ${}^{135}$Nd
• Chiral dynamics in soft triaxial nuclei
• Negative-parity high-spin structure of 105Pd