High-resolution laser spectroscopy of singly charged natural uranium isotopes

Andrea Raggio; Michael Block; Paul Campbell; Bradley Cheal; Ruben P de Groote; Wouter Gins; Ágota Koszorús; Iain D Moore; Alejandro Ortiz-Cortes; Ilkka Pohjalainen; Jessica Warbinek

doi:10.1038/s41598-024-76975-w

High-resolution laser spectroscopy of singly charged natural uranium isotopes

Sci Rep. 2024 Oct 27;14(1):25621. doi: 10.1038/s41598-024-76975-w.

Authors

Andrea Raggio¹, Michael Block^{2

3

4}, Paul Campbell⁵, Bradley Cheal⁶, Ruben P de Groote^{7

8}, Wouter Gins⁷, Ágota Koszorús^{6

8}, Iain D Moore⁷, Alejandro Ortiz-Cortes^{7

9

10}, Ilkka Pohjalainen⁷, Jessica Warbinek^{2

3

11}

Affiliations

¹ Accelerator Laboratory, Department of Physics, University of Jyväskylä, Jyväskylä, 40014, Finland. [email protected].
² GSI Helmoltzzentrum für Schwerionenforschung GmbH, Planckstr.1, 64291, Darmstadt, Germany.
³ Department of Chemistry-TRIGA Site, University of Mainz, 55099, Mainz, Germany.
⁴ Helmholtz Institute Mainz, 55099, Mainz, Germany.
⁵ Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK.
⁶ Department of Physics, University of Liverpool, Liverpool, L69 7ZE, UK.
⁷ Accelerator Laboratory, Department of Physics, University of Jyväskylä, Jyväskylä, 40014, Finland.
⁸ KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001, Leuven, Belgium.
⁹ Grand Accelerateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen, France.
¹⁰ Facility for Rare Isotope Beams, Michigan State University, 630 South Shaw Lane East, Lansing, MI, 48824, USA.
¹¹ Experimental Physics Department, CERN, 1211, Geneva 23, Switzerland.

Abstract

High-resolution collinear laser spectroscopy has been performed on singly charged ions of $^{234, 235, 238}$ U at the IGISOL facility of the Accelerator Laboratory, University of Jyväskylä, in Finland. Ten ionic transitions from the $^{4} I_{9 / 2}$ and $^{6} L_{11 / 2}$ ground and first excited states were measured in the 300 nm wavelength range, improving the precision of the hyperfine parameters of the lower states in addition to providing newly measured values for the upper levels. Isotope shifts of the analyzed transitions are also reported for $^{234, 235}$ U with respect to $^{238}$ U.

Keywords: Actinides; Collinear laser spectrocopy; IGISOL.

Abstract

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