A New Method of Calculating Trap Depth of Rare Earth Materials

摘要

The mainly characteristic of trapping materials is the trap depth. So it is significant to calculate the trap depth for the trapping materials. A new method of calculating trap depth, which is based on energy band and using rate equations to analyze thermoluminescence, was brought forward. This method which uses the rate equations of the process and the thermoluminescence curve can replace traditional methods such as first order or second order kinetics. The trap depth of SrAl2O4∶Eu 2+ , Dy 3+ and Sr4Al 14 O 25 ∶Eu 2+ , Dy 3+ was estimated from the glow curve. Then the numevical solution of the trap depth can be obtained. From the results of experiments and calculations, this method can accurately indicate the whole process.