Linearly modulated photoconductivity and linearly modulated optically stimulated luminescence measurements on Al2O3 : C

A measurement technique is introduced which involves linearly modulating th e power of the stimulation light while measuring the photoconductivity in A l2O3:C. This produces peaks in the measured photoconductivity instead of th e typical exponential decay seen when using a constant power stimulation li ght. The technique, called linearly modulated photoconductivity (LM-PC), is the conductivity equivalent of linearly modulated optically stimulated lum inescence (LM-OSL). Two peaks are seen in the LM-PC measurements that corre spond to the same charge residing in the 450 and 600 K thermally stimulated conductivity peaks, respectively. Simultaneous measurements on both the LM -PC and LM-OSL reveal that the second peak in the LM-PC is not present in t he LM-OSL. Deconvolutions are performed on the LM-OSL to determine the unde rlying components that make up the detected OSL emissions. (C) 2001 America n Institute of Physics.