Highly charged ion approach to measure nuclear charge radii of Fr, Ra, and Rn isotopes for precision measurements
Conventional electron scattering and muonic atom spectroscopy techniques are challenging to apply to heavy ions unless the element has at least one stable or extremely long-lived isotope. To overcome this limitation, a recently introduced method for determining nuclear charge radii relies on extreme-ultraviolet (EUV) spectroscopy of the D 1 line in highly charged Na-like ions. In this work, we present an experimental approach to measure the nuclear charge radii of isotopes of radioactive elements such as Fr, Ra, and Rn using this method at TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN) instrument, located at the ISAC radioactive beam facility. We also explore the potential of using Na-like D 2 lines in the soft x-ray region for future measurements. • APNC measurements in heavy isotopes depend on precise nuclear charge radii. • We present a Na-like ion method to determine nuclear charge radii with fewer atoms. • This method will be used at TRIUMF’s TITAN to measure Fr, Ra, and Rn charge radii. • We project 2–4× better precision on Fr and Ra charge radii. • We propose soft-x-ray Na-like D2 measurements to extract nuclear radii..
Authors
- S. A. Blundell (ORCID: https://orcid.org/0000-0002-5260-002X)
- R. Silwal (ORCID: https://orcid.org/0000-0003-4175-4135)
- Yuri V. Ralchenko (ORCID: https://orcid.org/0000-0003-0083-9554)
- Fernando Maldonado Millán (ORCID: https://orcid.org/0009-0005-8649-018X)
- Endre Takács (ORCID: https://orcid.org/0000-0002-2427-5362)
- Dipti Dipti (ORCID: https://orcid.org/0000-0001-6675-8509)
- J. D. Gillaspy (ORCID: https://orcid.org/0009-0004-3938-0247)
- H. Staiger (ORCID: https://orcid.org/0009-0000-6856-0037)
- Adam Hosier (ORCID: https://orcid.org/0000-0003-2836-6605)
- A. A. Kwiatkowski
- G. C. O’Neil (ORCID: https://orcid.org/0000-0003-3450-2263)
- Y. Wang (ORCID: https://orcid.org/0009-0001-3471-0364)
- G. Gwinner (ORCID: https://orcid.org/0000-0002-6744-4365)
- A. Lapierre
- J. D. Cardona
Institutions
- Institut polytechnique de Grenoble (FR)
- Centre National de la Recherche Scientifique (FR)
- TRIUMF (CA)
- U.S. National Science Foundation (US)
- National Institute of Standards and Technology (US)
- University of British Columbia (CA)
- University of Victoria (CA)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- CEA Grenoble (FR)
- Institut de Recherche Interdisciplinaire de Grenoble (FR)
- ASIS Foundation (US)
- International Isotopes (United States) (US)
- Appalachian State University (US)
- University of Manitoba (CA)
- Clemson University (US)
- Université Grenoble Alpes (FR)
Publication Details
- Journal
- Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment
- Published
- 2025-08-27
- DOI
- https://doi.org/10.1016/j.nima.2025.170947
- Citations
- 1
- Primary Topic
- Nuclear physics research studies
- Type
- article
- Field-Weighted Citation Impact
- 1.87
Funders
- National Science Foundation
- U.S. Department of Energy
- National Institute of Standards and Technology
- Office of Science
- Natural Sciences and Engineering Research Council of Canada
- National Research Council Canada
- Nuclear Physics