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Island of rare earth nuclei with tetrahedral and octahedral symmetries: Possible experimental evidence

Abstract : Calculations using realistic mean-field methods suggest the existence of nuclear shapes with tetrahedral T-d and/or octahedral O-h symmetries sometimes at only a few hundreds of keV above the ground states in some rare earth nuclei around Gd-156 and Yb-160. The underlying single-particle spectra manifest exotic fourfold rather than Kramers's twofold degeneracies. The associated shell gaps are very strong, leading to a new form of shape coexistence in many rare earth nuclei. We present possible experimental evidence of the new symmetries based on the published experimental results-although an unambiguous confirmation will require dedicated experiments
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http://hal.in2p3.fr/in2p3-00093531
Contributor : Yvette Heyd <>
Submitted on : Wednesday, September 13, 2006 - 2:36:05 PM
Last modification on : Friday, May 8, 2020 - 1:10:47 AM

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J. Dudek, D. Curien, N. Dubray, J. Dobaczewski, V. Pangon, et al.. Island of rare earth nuclei with tetrahedral and octahedral symmetries: Possible experimental evidence. Physical Review Letters, American Physical Society, 2006, 97, pp.072501. ⟨10.1103/PhysRevLett.97.072501⟩. ⟨in2p3-00093531⟩

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