Dsub(3d) distortion in CsUF6

A slight Dsub(3d) distortion on the octahedral UF6- complex splits the GAMMA8' and GAMMA8 octahedral levels into four doublets. These doublets and other electronic levels of the CsUF6 ground configuration have been identified according to their vibronic side-bands. In the calculation of the crystal field Hamiltonian, the amount of Dsub(3d) distortion on the UF6- octahedron is treated as the parameter, Δ. The interactions of the 5f electron of the UF6- complex contains five parameters: xisub(5f), B20, B40, B60 and Δ. The calculated energy spectrum and the g-tensor of the ground state show good agreement with the experimental measurements. (author)