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Structure of ^{78}Ni from First-Principles Computations.

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Researchers confirmed Nickel-78 (78Ni) is doubly magic, a key nuclear structure. This finding, using advanced nuclear interactions, aids studies of rare isotopes and nuclear physics.

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Area of Science:

  • Nuclear Physics
  • Quantum Chromodynamics
  • Nuclear Astrophysics

Background:

  • Doubly magic nuclei are fundamental building blocks in nuclear physics.
  • Nickel-78 (78Ni) is predicted to be doubly magic, but theoretical studies are challenging due to its extreme neutron-to-proton ratio and continuum proximity.

Purpose of the Study:

  • To theoretically investigate the nuclear structure of doubly magic Nickel-78 (78Ni) and its neighboring isotopes.
  • To confirm the doubly magic nature of 78Ni and predict its low-lying states.

Main Methods:

  • Utilized chiral nucleon-nucleon and three-nucleon interactions for theoretical calculations.
  • Correlated the Jπ=21+ state in 78Ni with that of 48Ca to predict nuclear properties.

Main Results:

  • Confirmed that 78Ni is a doubly magic nucleus.
  • Predicted the Jπ=21+ state in 78Ni.
  • Provided predictions for the low-lying states of 79Ni and 80Ni.

Conclusions:

  • The study validates 78Ni as a doubly magic nucleus.
  • The predicted states for 79Ni and 80Ni facilitate future shell-model studies of rare isotopes.
  • This research advances the understanding of nuclear structure in neutron-rich regions.