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Investigations of nuclear chirality at iThemba LABS

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Abstract

Progress in the studies of chirality in atomic nuclei at iThemba LABS is reviewed. New regions of chirality, around mass 80 and 190 have been discovered using the AFRODITE array, specifically in the nuclei 74As, 78,80,82Br, 81Kr, and 193,194,198Tl. Many phenomena have been observed, including multiple chiral bands in the same nucleus, the coexistence of octupole correlations and nuclear chirality, and the coexistence of pseudo spin and nuclear chirality. The best example of chiral degeneracy to date was found in 194Tl. The level scheme of 106Ag has been revisited and interpreted in terms of two- and four-quasiparticle bands. Investigations using the particle-rotor model have shown that the fingerprints of chirality in the two-quasiparticle system only can occur in an idealised model description. For systems with a higher number of quasiparticles, the calculations showed that nuclear chirality can persist.

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Acknowledgements

The authors gratefully thank the numerous members of the iThemba LABS technical staff and accelerator group for their support. This work was supported by the National Research Foundation of South Africa under Grant Nos. 65268, 65581, 75248, 75357, 76632, 80977, 88646, 90741, 91446, 92791, 92792, 93531, 103478, 109134 and 116666, the Outstanding Youth Fund of the Natural Science Foundation of Shandong Province (No. ZR2020YQ07), and the National Natural Science Foundation of China (Nos. U2167202, 12075137, 12075138, and 12225504).

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Authors and Affiliations

  1. iThemba Laboratory for Accelerator Based Sciences, National Research Foundation, P.O. Box 722, Somerset-West, 7129, South Africa

    R. A. Bark & E. A. Lawrie

  2. Department of Physics, University of the Western Cape, Private Bag X17, 7535, Bellville, South Africa

    E. A. Lawrie

  3. Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, 264209, China

    C. Liu & S. Y. Wang

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  1. R. A. Bark
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Correspondence to R. A. Bark.

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Bark, R.A., Lawrie, E.A., Liu, C. et al. Investigations of nuclear chirality at iThemba LABS. Front. Phys. 19, 24302 (2024). https://doi.org/10.1007/s11467-023-1340-0

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