Ab initio computations of strongly deformed nuclei

ORAL

Abstract

While ab initio nuclear computations have advanced to the 208Pb region, nuclei with strong static or collective correlations β€” such as the strongly deformed nuclei or those exhibiting shape coexistence β€” remain challenging for nuclear theory. We developed coupled-cluster calculations that start from deformed Hartree-Fock states, followed by restoring broken rotational symmetry through angular-momentum projection. In this talk, I will present two recent applications in the A~80 region: one on heavy N=Z isotopes near 80Zr [1], and another on 78Ni towards 70Ca along 𝑁 =50 [2]. We found rich shape coexistence in this region and made predictions on the rotational bands, using chiral NN and 3N forces. We also conducted a systematic study of B(E2) transitions, and found the ab initio calculation reproduces the existing data well.

[1]. Ab initio computations of strongly deformed nuclei near 80Zr, B. S. Hu, Z. H. Sun, G. Hagen, and T. Papenbrock, Phys. Rev. C (Letter) 110, L011302 (2024). Editors’ Suggestion. arXiv:2405.05052.

[2]. Ab initio computations from 78Ni towards 70Ca along neutron number N = 50, B. S. Hu, Z. H. Sun, G. Hagen, G. R. Jansen, and T. Papenbrock, Phys. Lett. B 858, 139010 (2024). arXiv:2408.07856.

*This work was supported by the U.S. Department of Energy (DOE), Office of Science, under SciDAC-5 (NUCLEI collaboration) and contract DE-FG02-97ER41014, by the Quantum Science Center, a National Quantum Information Science Research Center of the U.S. Department of Energy. Computer time was provided by the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program. This research used resources from the Oak Ridge Leadership Computing Facility located at ORNL, which is supported by the Office of Science of the Department of Energy under Contract No. DE-AC05-00OR22725.

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Publication: [1]. Ab initio computations of strongly deformed nuclei near 80Zr, B. S. Hu, Z. H. Sun, G. Hagen, and T. Papenbrock, Phys. Rev. C (Letter) 110, L011302 (2024). Editors' Suggestion. arXiv:2405.05052.
[2]. Ab initio computations from 78Ni towards 70Ca along neutron number N = 50, B. S. Hu, Z. H. Sun, G. Hagen, G. R. Jansen, and T. Papenbrock, Phys. Lett. B 858, 139010 (2024). arXiv:2408.07856.

Presenters

  • Baishan Hu

    • Texas A&M University

Authors

  • Baishan Hu

    • Texas A&M University

  • zhonghao sun

    • Louisiana State University
    • Oak Ridge National Laboratory

  • Gaute Hagen

    • Oak Ridge National Laboratory

  • Gustav R Jansen

    • Oak Ridge National Laboratory

  • Thomas Papenbrock

    • University of Tennessee