Collinear fast-beam-laser and rf-laser double-resonance spectroscopy have been carried out in ²³⁵U II, allowing a detailed study of the hyperfine structure (hfs) of the three low odd configurations 5ƒ³(7s² + 6d7s + 6d²). Intermediate coupling wave functions, using parametric fitting, have been determined, allowing a parameterization of the hyperfine interaction. Ab initio Dirac-Fock calculations combined with this parameterization of our experimental data have allowed an analysis of the hfs of ²³⁵U II, resulting in a new value for the magnetic-dipole moment μ_I = −0.38(3) nm and a spin density a7s¹⁰ = −2880(75) MHz of the 7s electron.

© 1984 Optical Society of America

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