Most Degenerate Chiral Doublet Bands in Nuclei
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Updated: Nov 2, 2026

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
1Shandong University, Shandong Provincial Key Laboratory of Nuclear Science, Nuclear Energy Technology and Comprehensive Utilization, School of Nuclear Science, Energy and Power Engineering, Jinan, Shandong 250061, China.
Abstract:
A doublet-band structure consisting of two ΔI=1 bands connected by multiple interband transitions was identified in ^{112}Sb, with an average energy difference of only 36 keV between the two bands. It represents the most degenerate doublet-band structure observed so far in nuclear systems. The experimental fingerprints and theoretical calculations indicate that the doublet-band structure arises from chiral symmetry breaking. This result provides the first example in which a pure high-j particle-hole configuration and triaxial rotational behavior emerge simultaneously, giving rise to exceptionally strong chiral degeneracy.
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