Collinear laser spectroscopy on neutron-rich actinium isotopes
High-resolution collinear laser spectroscopy of neutron-rich actinium has been performed at TRIUMF's isotope separator and accelerator facility ISAC. By probing the $7{s}^{2}\phantom{\rule{4pt}{0ex}}^{1}S_{0}\phantom{\rule{4pt}{0ex}}\ensuremath{\rightarrow}\phantom{\rule{4pt}{0ex}}6d7p\phantom{\rule{4pt}{0ex}}^{1}P_{1}$ ionic transition, the hyperfine structures and optical isotope shifts in $^{225,226,228,229}\mathrm{Ac}^{+}$ 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 $^{225,226,228,229}\mathrm{Ac}$ are determined for the first time.
Authors
- Ruohong Li (ORCID: https://orcid.org/0000-0002-6113-0859)
- A. Teigelhöfer
- Per Jönsson (ORCID: https://orcid.org/0000-0001-6818-9637)
- Monika Stachura (ORCID: https://orcid.org/0000-0003-1426-689X)
- J. D. Johnson (ORCID: https://orcid.org/0000-0003-4397-5732)
- Victoria L. Karner (ORCID: https://orcid.org/0000-0002-2915-2652)
- Jacek Bieroń (ORCID: https://orcid.org/0000-0002-0063-4631)
- J. Lassen (ORCID: https://orcid.org/0000-0003-2485-0993)
- András Gácsbaranyi (ORCID: https://orcid.org/0009-0005-0156-1808)
- Mingxuan Ma (ORCID: https://orcid.org/0009-0006-0227-8120)
- Mathias Roman
- Jiguang Li (ORCID: https://orcid.org/0000-0002-9592-4964)
- Martin Radulov
Institutions
- Jagiellonian University (PL)
- TRIUMF (CA)
- Simon Fraser University (CA)
- Malmö University (SE)
- Institute of Applied Physics and Computational Mathematics (CN)
- University of Manitoba (CA)
- Saint Mary's University (CA)
- University of Windsor (CA)
- KU Leuven (BE)
Publication Details
- Journal
- Physical review. C
- Published
- 2025-05-28
- DOI
- https://doi.org/10.1103/physrevc.111.054320
- Citations
- 1
- Primary Topic
- Nuclear physics research studies
- Type
- article
- Field-Weighted Citation Impact
- 1.87
Funders
- National Natural Science Foundation of China
- Natural Sciences and Engineering Research Council of Canada
- National Research Council Canada