Year: 2025
Type: preprint
Abstract: High-resolution collinear laser spectroscopy of neutron-rich actinium has been performed at TRIUMF's isotope separator and accelerator facility ISAC. By probing the $7s^2~^1S_0$ $\rightarrow$ $6d7p~^1P_1$ ionic transition, the hyperfine structures and optical isotope shifts in $^{225, 226, 228, 229}\!$Ac$^+$ have been measured. This allows precise determinations of the changes in mean-square charge radii, magnetic dipole moments, and electric quadrupole moments of these actinium isotopes. The improved precision of charge radii and magnetic moments clears the ambiguity in the odd-even staggering from previous studies. The electric quadrupole moments of $^{225, 226, 228, 229}\!$Ac are determined for the first time.
Source: arXiv (Cornell University)
Authors: Li, Ruohong, Teigelh\"ofer, Andrea, Li, Jiguang, Biero\'n, Jacek, G\'acsbaranyi, Andr\'as, Johnson, Jake, J\"onsson, Per, Karner, Victoria, Ma, Mingxuan, Radulov, Martin, Roman, Mathias, Stachura, Monika, Lassen, Jens
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W6979378142
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