Gw. Burdick et al., DIRECT CALCULATION OF LANTHANIDE OPTICAL-TRANSITION INTENSITIES ND3+YAG, Journal of alloys and compounds, 225(1-2), 1995, pp. 115-119
The influence of Coulomb and spin-orbit interactions on one-photon tra
nsitions within the 4f(3) configuration of Nd3+ in YAG is taken into a
ccount by a ''direct'' calculation, which explicitly evaluates the eig
enstates of 4f(3) and 4f(2)5d. The interconfigurational crystal-field
parameters are fitted to the experimental data and the traditional one
-electron intensity parameters are retained to account for non-crystal
-field mechanisms. A small but significant improvement in the fit is o
btained.