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Rotating deformed halo nuclei and shape decoupling effects.

Xiang-Xiang Sun1, Shan-Gui Zhou2

  • 1School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China; CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China.

Science Bulletin
|January 19, 2023
PubMed
Summary
This summary is machine-generated.

This study explores rotational excitation in deformed halo nuclei using the deformed relativistic Hartree-Bogoliubov theory in continuum plus angular momentum projection. Results show halo structures persist in rotational states, revealing shape decoupling effects.

Keywords:
Beyond mean field methodDeformed halo nucleiDensity functional theoryRotational excitationShape decoupling effects

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Area of Science:

  • Nuclear Physics
  • Quantum Mechanics

Background:

  • Deformed halo nuclei exhibit unique properties due to their extended spatial distributions.
  • Understanding their rotational behavior is crucial for nuclear structure theory.

Purpose of the Study:

  • To investigate the rotational excitation of deformed halo nuclei.
  • To explore how halo structures evolve in rotational states.

Main Methods:

  • Implementation of angular momentum projection (AMP) within the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc).
  • Expansion of mean field and collective wave functions using the Dirac Woods-Saxon basis.
  • Self-consistent description of single-particle states coupled to the continuum in ground and rotational states.

Main Results:

  • The deformed halo structure is shown to persist from the ground state to collective rotational states.
  • Investigation of rotational modes in 42,44Mg, analyzing excitation energy, configuration, and density distribution.
  • Revelation of characteristic shape decoupling effects in rotating deformed halo nuclei.

Conclusions:

  • The DRHBc + AMP approach successfully describes rotational properties of deformed halo nuclei.
  • Deformed halo nuclei maintain their characteristic structure during rotation.
  • Observed shape decoupling effects provide new insights into nuclear dynamics.