Intermediate coupled wave functions of R 3+ in LiRP 4O 12 (R = Pr or Tm)

Abstract

The electronic energy levels of Pr 3+ in LiPrP 4O 12 and Tm 3+ in LiTmP 4O 12 have been determined from room-temperature absorption spectra of single crystals in the range 185–3200 nm. The eigenstates of Pr 3+ and Tm 3+ have been computed and used in the evaluation of the matrix elements of the tensor operator ⋓ ( k) and the intensity parameters Ω k of the observed transitions.