Impact of Two-Body Currents on Magnetic Dipole Moments of Nuclei

Miyagi, T.; Cao, X.; Seutin, R.; Bacca, S.; Garcia Ruiz, R. F.; Hebeler, K.; Holt, J. D.; Schwenk, A.

doi:10.1103/PhysRevLett.132.232503

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Impact of Two-Body Currents on Magnetic Dipole Moments of Nuclei

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Miyagi, T.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Seutin, R.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Hebeler, K.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Schwenk, A.
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.132.232503
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引用

Miyagi, T., Cao, X., Seutin, R., Bacca, S., Garcia Ruiz, R., Hebeler, K., Holt, J., & Schwenk, A. (2024). Impact of Two-Body Currents on Magnetic Dipole Moments of Nuclei. Physical Review Letters, 132(23):. doi:10.1103/PhysRevLett.132.232503.

引用: https://hdl.handle.net/21.11116/0000-000F-6619-3

要旨

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 multishell effects for ⁴¹Ca, which suggest that the Z = N = 20 gap in ⁴⁰Ca is not as robust as in ⁴⁸Ca. The increasing contribution of two-body currents in heavier systems is explained by the operator structure of the center-of-mass dependent Sachs term.