High-resolution laser resonance ionization spectroscopy of $$^{143-147}$$Pm
Dominik Studer, J. Ulrich, S. Braccini, Tommaso Stefano Carzaniga, R. Dressler, Klaus Eberhardt, Reinhard Heinke, U. Köster, S. Raeder, K. Wendt
Abstract
Abstract We present the results of high-resolution laser spectroscopy of the long-lived radioactive isotopes $$^{143-147}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow/><mml:mrow><mml:mn>143</mml:mn><mml:mo>-</mml:mo><mml:mn>147</mml:mn></mml:mrow></mml:msup></mml:math> 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 $$^{143-147}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow/><mml:mrow><mml:mn>143</mml:mn><mml:mo>-</mml:mo><mml:mn>147</mml:mn></mml:mrow></mml:msup></mml:math> Pm were derived, and the measured isotope shifts allowed the extraction of changes in nuclear mean square charge radii.