We also used fractal approach [20] for characterization of
measured at 9 K decay kinetics curves for yellow–red luminescence.
The best fit was obtained for the case of first order fractal
kinetics, which is characterized with stretched exponent –
I(t)¼N0exp[(Rt)β
], where Rt is dimensionless time and t is real
time. Result of fitting is presented in Fig. 10. The only conclusion,
which we able to make from this fit, is that first order fractal
recombination kinetics is related to geminate pairs recombination.
The 600 nm band is main in thermally stimulated luminescence,
Fig. 11 obtained after x-ray irradiation at 9 K. whereas the