8isthiw!t!w of this bocdmsit is -2- i. systematic analysis of the energies of lanthanide transitions in solids and in aqueous solution

In this systematic examination of some of the spectroscopic properties of the f-elements we deal with both the trivalent lanthanides and actinides. We summarize the present status of our energy level calculations in single crystal matrices and in aqueous solution, and compare the predicted crystal-field structure in certain low-symmetry sites with that observed. Some interesting new structural insights are thereby gained. The state eigenvectors from these calculations are then used in part in reassessing and interpreting the intensities of transitions in aqueous solution via the Judd-Ofelt theory. The parameters of this theory derived from fitting experimental data are compared with those computed from model considerations. Finally, we discuss some recent contributions to the interpretation of excited state relaxation processes in aqueous solution. Tht ntbmimd manuicriet h« bmn authored by » contraclor Ol tlw U. S. Gowmmtn! undut contract No. W-31-lOfrENG-M. Awordinflv. tti» U. S. Govtrnmtnt wwnt * nontacliKwt. rovaKv-I'M Hem* n pvtotiih of nproduct tlx publMnd More