Title: Nuclear moments, charge radii, and magnetization distribution parameters of Ag isotopes from laser spectroscopy and ab initio electronic-structure calculations
Speaker: Bram van den Borne, CERN
Abstract: Exploring ground-state nuclear properties is a powerful tool to investigate our understanding of nuclear structure. Laser spectroscopy gives access to nuclear model-independent measurements of the ground-state properties of short-lived (≥10 ms) nuclei, providing an excellent benchmark for theoretical predictions [1].
Extracting nuclear moments of radioactive isotopes from laser spectroscopy requires knowledge of the electromagnetic fields generated by the atomic electrons they interact with. However, these fields can not always be calculated accurately, so most nuclear moments are extracted using a reference, usually a stable isotope from a non-optical measurement such as nuclear magnetic resonance.
In silver (Z = 47), two stable (reference) isotopes 107,109Ag have been used to extract the nuclear magnetic dipole moment, leading to inconsistencies. Moreover, the atomic ground state, most commonly used to extract the dipole moment, is sensitive to the Bohr-Weisskopf (BW) effect,which, despite reaching up to 3.4% in silver [2], is often neglected in the literature.
In this seminar, I will present our work [3] reevaluating the magnetic dipole moments of stable silver reference isotopes, resolving the inconsistencies. Additionally, I will show the ab initio calculations of the hyperfine fields and how they can be utilized to extract the nuclear dipole moments and the magnetization parameter independent of the nuclear model and atomic state. Lastly, I will address possible future opportunities for BW effect studies as a probe of the nuclear magnetization distribution.
[1] P. Campbell, I. Moore, and M. Pearson, Prog. in Part. and Nucl. Phys. 86 (2016) 127.
[2] J.R. Persson, At. Data Nucl. Data Tables 154 (2023) 101589.
[3] L.V. Skripnikov, et al., arXiv e-Print 2609.40130 (2026).
