Abstract
The mechanism of energy transfer between Tb and Nd in sodium borate glass has been examined at 80, 300 and 500 K. By the measurements of the concentration dependence of intensity and lifetime, it has been found that the transfer from the 5D 4 level of Tb is predominantly by dipole-dipole interaction at high Nd concentrations. At low Nd concentration, however, the interaction shows a linear dependence with concentration. This linear concentration dependence is attributable to energy migration in glass. Further, the 5D 4→ 7F 4 transition of Tb has also been found to be quenched by radiative transfer. The 5D 3 level of Tb is also quenched by dipole-dipole interaction.
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