26th Australian Institute of Physics Congress and the Australian and New Zealand Conference on Optics and Photonics

Extraction of nuclear moments from high-precision atomic structure

Not scheduled

20m

Belinda Hutchinson Building (The University of Sydney )

Contributed Oral AIP | Theoretical Physics (TPG)

Speaker

Jayden Hasted (The University of Queensland)

Description

Atomic theory plays an irreplaceable role in the determination of nuclear moments from measured hyperfine structure. Such quantities permit the interrogation of nuclear structure in model-independent ways. Indeed, magnetic dipole and electric quadrupole moments have become standard benchmarks for nuclear models, but higher-order moments can impose additional and unique constraints.

Atomic parity violation studies, which are amongst the most precise low-energy probes for physics beyond the Standard Model, share a common dependence with hyperfine structure on accurately modelled electronic structure in the nuclear region. Studies of hyperfine structure at a high-precision therefore help to assess the validity of atomic theory.

The effect of these moments enter at a tiny level due to their increasing localisation in the nuclear vicinity. Requiring paramount precision in atomic theory and measured observables, these moments have only been extracted for a select number of systems.

This work presents high-precision ab initio calculations of hyperfine structure for the extraction of higher-order nuclear moments, in theory-limited atoms and ions of interest.