Intensities of optical transitions of Nd3+ ions in Pb(MoO4)x(WO4)1–x crystals

Abstract

Based on an analysis of absorption spectra from ⁴I_9/2 ground state to the excited states of Nd³⁺ ions in Pb(MoO₄)_x(WO₄)_1–x crystals, the main spectroscopic characteristics, including the probabilities of intermultiplet transitions and radiative lifetimes, are determined with the help of Judd–Ofelt method. The values of Judd–Ofelt parameters Ω₂ = 8.91 × 10^–20 cm², Ω₄ = 4.50 × 10^–20 cm², and Ω₆ = 3.89 × 10^–20 cm² are obtained for Nd³⁺ ions in Pb(MoO₄)_x(WO₄)_1–x crystals. The calculated radiative lifetime is compared with experimentally measured luminescence decay time.