Judd-Ofelt analysis of photoacoustic spectra of powdered neodymium compounds

摘要

Photoacoustic (PA) spectra of powdered neodymium oxide: Nd_2O_3 (A type). neodymium hydrated chloride: NdCl_3 centre dot 6H_2O and neodymium fluoride: NdF_3 are reported. PA band shifts as compared to their positions in aqueous Nd(III) ion have been used to calculate the nephelauxetic parameters of their compounds. The variation of these parameters and correlation with the nature of metal-ligands bonding have been discussed. A novel method is introduced to determine relative values of Judd-Ofelt parameters and oscillator strengths of powdered samples using PA spectroscopy. It is found that a linear correlation exists between relative values of #tau#_2 and relative oscillator strengths of hypersensitive transitions of the title compounds. It can be hoped that the new method of PA technique may serve for the Judd-Ofelt quantitative analysis of powdered rare earth compounds.