Symmetry and Shape Coexistence in ¹⁰Be

Journal Article · 24 February 2022 · Bulgarian Journal of Physics

DOI: https://doi.org/10.55318/bgjp.2022.49.1.057 · OSTI ID:1973184

Caprio, Mark A. ^[1]; McCoy, Anna E. ^[2]; Fasano, Patrick J. ^[3]; Dytrych, Tomas ^[4]

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1. Univ. of Notre Dame, IN (United States); University of Notre Dame
2. Univ. of Washington, Seattle, WA (United States)
3. Univ. of Notre Dame, IN (United States)
4. Nuclear Physics Inst. of the Czech Academy of Sciences, Rez (Czech Republic); Louisiana State Univ., Baton Rouge, LA (United States)

Within the low-lying spectrum of ¹⁰Be, multiple rotational bands are found, with strikingly different moments of inertia. A proposed interpretation has been that these bands variously represent triaxial rotation and prolate axially-deformed rotation. The bands are well-reproduced in ab initio no-core configuration interaction (NCCI) calculations. Here, we use the calculated wave functions to elucidate the nuclear shapes underlying these bands, by examining the Elliott SU(3) symmetry content of these wave functions. The ab initio results support an interpretation in which the ground-state band, along with an accompanying K = 2 side band, represent a triaxial rotor, arising from an SU(3) irreducible representation in the 0hw space. Then, the lowest excited K = 0 band represents a prolate rotor, arising from an SU(3) irreducible representation in the 2hw space.

• Research Organization: Univ. of Notre Dame, IN (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: FG02-95ER40934; FG02-00ER41132; AC02-05CH11231
• OSTI ID: 1973184
• Journal Information: Bulgarian Journal of Physics, Journal Name: Bulgarian Journal of Physics Journal Issue: 1 Vol. 49; ISSN 1310-0157
• Publisher: Heron Press Ltd., SofiaCopyright Statement
• Country of Publication: United States
• Language: English