Nuclear moments and isotope shifts of the actinide isotopes <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Cf</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>249</mml:mn><mml:mtext>–</mml:mtext><mml:mn>253</mml:mn></mml:mrow></mml:mmultiscripts></mml:math> probed by laser spectroscopy

We report on high-resolution laser spectroscopy studies Cf249–253 with spectral linewidths in the order of 100 MHz carried out at RISIKO mass separator Mainz University. In total three atomic ground-state transitions were investigated and hyperfine parameters for odd-A isotopes isotope shift all examined have been determined from measured spectra. The measurements allowed tracking changes mean-squared charge radii across deformed nuclear shell closure N=152, whereby shape discontinuities not observed. Experimental coupling constants ground state combined relativistic many-body calculations to extract magnetic-dipole moment Cf249 improved precision μI(249Cf)=−0.395(17)μN, whereas μI(251Cf)=−0.571(24)μN μI(253Cf)=−0.731(35)μN derived first time. Additionally, spectroscopic quadrupole moments QS(249Cf)=6.27(33)eb QS(253Cf)=5.53(51)eb extracted.Received 20 December 2022Accepted 7 February 2023DOI:https://doi.org/10.1103/PhysRevC.107.034313Published by American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution this work must maintain attribution author(s) published article's title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasFine & structurePropertiesA ≥ 220TechniquesAb initio calculationsRadioactive beamsNuclear Physics