Energy transfer from UO ++2 → Nd 3+ in barium borate glass

Abstract

Radiative and non-radiative energy transfer from UO ++ 2 to Nd 3+ has been studied in barium borate glass. Probabilities, efficiencies and the mechanism of non-radiative energy transfer were determined from UO ++ 2 fluorescence decay rates. At low acceptor concentrations pair-wise energy transfer involving migration among donors leads to a non-radiative transfer rate which depends linearly on the concentration of Nd 3+. It is decided that resonant radiationless dipole-dipole transfer of energy is the dominant mechanism active in this system. However, the observations of transfer yield for high acceptor concentrations are contrary to those at low acceptor concentrations as evidenced from the P da vs C 2 plot. Hence at high acceptor concentrations, the transfer could happen between a donor ion and two acceptor ions which is consistent with the view of Fong and Diestler.