Speaker
Description
The nuclear magnetic dipole moment is one of the major probes to investigate the structure of an atomic nucleus. For odd-mass systems, the simplest limit is to consider only the last unpaired nucleon, known as the single-particle or Schmidt limit. The dominance of the single-particle structure relates to the robustness of a magic number in a nucleus, and therefore the magnetic dipole moment can provide an insight into the magic property of a nucleus. Very recently, the magnetic dipole moments of indium isotopes were measured and show the abrupt jump at N=82 towards the Schmidt limit, supporting the expected magic property at N=82. The experimental data were confronted with calculation results from the ab initio valence-space in-meidum similarity renormalization group (VS-IMSRG) approach. While the VS-IMSRG results follow the experimental trend, the reproduction of measured magnetic moments remained challenging. In light nuclei, the significance of the two-body current contributions is already reported, and one expects that the effect is also non-negligible in heavier systems.
In this presentation, starting with the one- and two-body current in chiral effective field theory combined with the VS-IMSRG framework, we will show the results of magnetic moments for some selected light to heavy nuclei. Also, we will discuss that the two-body current effect on the magnetic dipole moment can be more important as we increase the mass number.
