ELECTRON-PARAMAGNETIC-RESONANCE AND OPTICAL-ABSORPTION SPECTRA OF FE(III) IONS IN LEAD ACETATE GLASSES

Electron paramagnetic resonance (EPR) and optical absorption spectra o f Fe(III) ions doped in lead acetate glasses have been studied. EPR sp ectra exhibit a single absorption line corresponding to g = 2.0. The l inewidths of the EPR absorption lines are studied as a function of tem perature and it is found that the linewidth decreases with increase in temperature. The optical absorption spectra of the glasses are measur ed at room temperature. The spectra exhibit five bands characteristic of Fe(III) ions in octahedral symmetry. The crystal field parameter Dq and the Racah interelectronic repulsion parameters B and C have been evaluated.