RELATIONSHIP BETWEEN THE OSCILLATOR STRENGTH VALUES AND AVERAGE BAND ENERGIES OF THE ELECTRONIC-TRANSITIONS OF SOME LANTHANOID(III) IONS DOPED IN DIFFERENT ENVIRONMENTS AND THEIR GROUND-STATE-J DESIGNATIONS

Electronic spectral studies of some lanthanoid (III) [Ln(III)] ions, n amely Pr(III), Nd(III), Sm(III), Eu(III) and Er(III), doped in two pse udo-garnet environments, sodium molybdate and sodium m-silicate, have been studied for the determination of their oscillator strength (f(JO) ) values. The intensities of the fluoresence emissions for Eu3+ in dif ferent media have also been recorded. The positions of spectral bands in the electronic spectra as well as the oscillator strength values fo r some prominent (preferably) hypersensitive transitions have been stu died as a function of ground state J values. (C) 1997 Elsevier Science B.V.