Electron beam induced thermoluminescence from Li + implanted Al 2O 3

Abstract

Electron beam induced thermoluminescence (TL) from Li + implanted Al 2O 3 has been investigated to determine the effect of Li + in Al 2O 3 on the TL. Electron beam induced TL curves from an unimplanted sample show TL peaks at 375 K, 440 K, and 460 K. In the TL curves from a Li + implanted sample, the 375 K and 460 K TL peaks disappear, while the 440 K TL peak is enhanced. The 375 K and 460 K peaks are assumed to be associated with F centers and the 440 K TL peak associated with F + centers, thus the Li + ions convert F centers to F + centers through a recombination process with electrons trapped in the F centers. The 440 K TL peak from Li + implanted Al 2O 3 is sensitively dependent on the excitation energy of the electrons, which allows the depth profile of Li + in Al 2O 3 to be determined.