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Title	Nuclear moments and isotope shifts of the actinide isotopes Cf249–253 probed by laser spectroscopy
Author(s)	Weber, Felix (Mainz U., Inst. Phys.) ; Albrecht-Schönzart, Thomas E (Florida State U.) ; Allehabi, Saleh O (New South Wales U.) ; Berndt, Sebastian (Mainz U., Inst. Phys. ; Mainz U.) ; Block, Michael (Darmstadt, GSI ; Mainz U. ; Helmholtz Inst., Mainz) ; Dorrer, Holger (Mainz U.) ; Düllmann, Christoph E (Darmstadt, GSI ; Mainz U. ; Helmholtz Inst., Mainz) ; Dzuba, Vladimir A (New South Wales U.) ; Ezold, Julie G (Oak Ridge) ; Flambaum, Victor V (New South Wales U.) ; Gadelshin, Vadim (Mainz U., Inst. Phys.) ; Goriely, Stephane (Brussels U., IAA) ; Harvey, Ashley (Oak Ridge) ; Heinke, Reinhard (CERN) ; Hilaire, Stephane (CEA DAM) ; Kaja, Magdalena (Mainz U., Inst. Phys.) ; Kieck, Tom (Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Kneip, Nina (Mainz U., Inst. Phys.) ; Köster, Ulli (Laue-Langevin Inst.) ; Lantis, Jeremy (Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Mokry, Christoph (Mainz U. ; Helmholtz Inst., Mainz) ; Münzberg, Danny (Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Nothhelfer, Steven (Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Oberstedt, Stephan (Euratom, Geel) ; Péru, Sophie (CEA DAM) ; Raeder, Sebastian (Darmstadt, GSI ; Helmholtz Inst., Mainz) ; Runke, Jörg (Darmstadt, GSI ; Mainz U.) ; Sonnenschein, Volker (Nagoya U. (main)) ; Stemmler, Matou (Mainz U., Inst. Phys.) ; Studer, Dominik (Mainz U., Inst. Phys.) ; Thörle-Pospiech, Petra (Mainz U. ; Helmholtz Inst., Mainz) ; Tomita, Hideki (Nagoya U. (main)) ; Trautmann, Norbert (Mainz U.) ; Van Cleve, Shelley (Oak Ridge) ; Warbinek, Jessica (Darmstadt, GSI ; Mainz U.) ; Wendt, Klaus (Mainz U., Inst. Phys.)
Publication	2023
Number of pages	10
In:	Phys. Rev. C 107 (2023) 034313
DOI	10.1103/PhysRevC.107.034313 (publication)
Subject category	Nuclear Physics - Experiment
Abstract	We report on high-resolution laser spectroscopy studies on Cf249–253 with spectral linewidths in the order of 100 MHz carried out at the RISIKO mass separator at Mainz University. In total three atomic ground-state transitions were investigated and the hyperfine parameters for the odd-A isotopes and isotope shift for all examined isotopes have been determined from the measured spectra. The isotope shift measurements allowed tracking of changes in mean-squared charge radii across the deformed nuclear shell closure at N=152, whereby shape discontinuities were not observed. Experimental hyperfine coupling constants of the atomic ground state were combined with relativistic many-body atomic calculations to extract the nuclear magnetic-dipole moment of Cf249 with improved precision to μI(249Cf)=−0.395(17)μN, whereas μI(251Cf)=−0.571(24)μN and μI(253Cf)=−0.731(35)μN were derived for the first time. Additionally, the spectroscopic quadrupole moments QS(249Cf)=6.27(33)eb and QS(253Cf)=5.53(51)eb were extracted.
Copyright/License	publication: © 2023-2024 authors (License: CC BY 4.0)

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