https://doi.org/10.1140/epja/s10050-020-00061-8
Regular Article – Experimental Physics
High-resolution laser resonance ionization spectroscopy of 
Pm
1
Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
2
Paul-Scherrer Institut, 5232, Villigen, Switzerland
3
Albert Einstein Center for Fundamental Physics, Laboratory for High Energy Physics, University of Bern, 3012, Bern, Switzerland
4
Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, 55099, Mainz, Germany
5
Institut Laue-Langevin, 38042, Grenoble, France
6
Helmholtz-Institut Mainz, 55099, Mainz, Germany
7
GSI Helmholtzzentrum für Schwerionenforschung, 64291, Darmstadt, Germany
* e-mail: dstuder@uni-mainz.de
Received:
9
October
2019
Accepted:
7
January
2020
Published online:
24
February
2020
We present the results of high-resolution laser spectroscopy of the long-lived radioactive isotopes Pm. The hyperfine structures and isotope shifts in two different atomic ground-state transitions at 452 nm and 468 nm were probed by in-source laser spectroscopy at the RISIKO mass separator in Mainz, using the PI-LIST ion source. From the hyperfine coupling constants the nuclear magnetic dipole and electric quadrupole moments for Pm were derived, and the measured isotope shifts allowed the extraction of changes in nuclear mean square charge radii.
© The Author(s), 2020
