Beschreibung:
Abstract The phosphorescence decay of radiation stimulated luminescent materials at a constant temperature reveals information on the processes involved. The shape of the decay curve depends on the kinetics. Inversely, a study of these curves yields information on the kinetic parameters. A way of presenting the phosphorescence decay which emphasises the features of the curve is to plot y=t(I(t) as a function of x=In t. This yields a peak shaped curve for a simple phosphorescence decay. This curve resembles the TL glow curve that one expects for the same kinetic law. In the present work, the shape of the curve is studied by checking the symmetry factor µg=d/? where d=x2-xm, ?=x2-x1 and where xm is the maximum point and x1, x2 are the two half-intensity points. The dependence of µg on the kinetic order b is determined. Inversely, the parameter b can be evaluated from the experimental results.