Impact of two-body currents on magnetic dipole moments of nuclei

Abstract

We investigate the effects of two-body currents on magnetic dipole moments of medium-mass and heavy nuclei using the valence-space in-medium similarity renormalization group with chiral effective field theory interactions and currents. Focusing on near doubly magic nuclei from oxygen to bismuth, we have found that the leading two-body currents globally improve the agreement with experimental magnetic moments. Moreover, our results show the importance of multi-shell effects for ${}^{41}$Ca, which suggest that the $Z=N=20$ gap in ${}^{40}$Ca is not as robust as in ${}^{48}$Ca. The increasing contribution of two-body currents in heavier systems is explained by the operator structure of the center-of-mass dependent Sachs term.

6 pages, 4 figures, supplemental material included

References in corpus (30)

• Chiral effective field theory and nuclear forces
• Improved nuclear matter calculations from chiral low-momentum interactions
• Accurate nuclear radii and binding energies from a chiral interaction
• A nucleus-dependent valence-space approach to nuclear structure
• A Guided Tour of Ab Initio Nuclear Many-Body Theory
• Ab initio predictions link the neutron skin of ${}^{208}$Pb to nuclear forces
• Three-Nucleon Low-Energy Constants from the Consistency of Interactions and Currents in Chiral Effective Field Theory
• In-Medium Similarity Renormalization Group for Open-Shell Nuclei
• Laser Spectroscopy for the Study of Exotic Nuclei
• Accurate bulk properties of nuclei from $A=2$ to $\infty$ from potentials with $\Delta$ isobars
• Electromagnetic Currents and Magnetic Moments in $\chi$EFT
• Two-pion exchange electromagnetic current in chiral effective field theory using the method of unitary transformation
• Three-Nucleon Forces: Implementation and Applications to Atomic Nuclei and Dense Matter
• Converged ab initio calculations of heavy nuclei
• Ab initio multi-shell valence-space Hamiltonians and the island of inversion
• Chiral Effective Field Theory Calculations of Weak Transitions in Light Nuclei
• Angular-momentum projection in coupled-cluster theory: structure of ${}^{34}$Mg
• In-medium similarity renormalization group with three-body operators
• Ab initio computation of charge densities for Sn and Xe isotopes
• Nuclear Currents in Chiral Effective Field Theory
• Ground-State Electromagnetic Moments of Calcium Isotopes
• \texttt{NuHamil}: A numerical code to generate nuclear two- and three-body matrix elements from chiral effective field theory
• Infrared extrapolations for atomic nuclei
• High-resolution laser spectroscopy of ${}^{27-32}$Al
• Normal ordering of three-nucleon interactions for ab initio calculations of heavy nuclei
• Nuclear DFT analysis of electromagnetic moments in odd near doubly magic nuclei
• Role of chiral two-body currents in ${}^6$Li magnetic properties in light of a new precision measurement with the relative self-absorption technique
• Ground State Electromagnetic Moments of ${}^{37}$Ca
• Magnetic dipole transition in ${}^{48}$Ca
• Ground State Magnetic Dipole Moment of ${}^{40}$Sc

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• Computational schemes for the Magnus expansion of the in-medium similarity renormalization group
• Ab initio calculations of nuclear charge radii across and beyond ${}^{132}$Sn: Putting chiral EFT nuclear interactions to the test
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