6. Summary

The title of the present M.Sc. thesis is "Modelling and Analysis of the Thermal Ionisation of the Paramagnetic Centres on the EPR basis."

The basis of the thermally stimulated processes is usually the Arrhenius law that says the escape probability for the single electron per second to be exponentially dependent on the negative reciprocal of the absolute temperature T. One of the purposes of the thesis was to explain if it was possible to determine the all parameters of the Arrhenius model at the same time on the basis of EPR kinetic.

The second purpose was to complement the pure Arrhenius model for electron processes that did not follow the pure Arrhenius model. The complementing had to take to account the retrapping of electrons and had to explain how retrapping was expressed in EPR kinetic.

The third purpose was briefly to explain how the results of the analysis would be affected by the experimental errors like systematic temperature error on the impulse heating scheme.

For that purposes the behaviour of the pure Arrhenius model was studied on the impulse heating scheme and was concluded that determine of the parameters of the model at the same time was possible. In the case of retrapping was not possible to determine the all parameters and instead of the analytical solution had to be use the numerical one. The model to simulate the overcharging of centres was suggested.

The systematical temperature error was studied and was concluded that this kind of error makes less reliable the calculated values for the parameters of the model.

The method was suggested to calculate the parameters of the model of the overcharging centres.

The importance of the so called linearization of the EPR curve was emphasised to study the thermally stimulated processes. The linearization gave the straight line only on case of the pure Arrhenius model. The other cases had a unique shape for the linearization curve.

Üles seatud Sun., 07.11.1999.
Viimati muudetud Sun., 07.11.1999 05:27 PM CEST
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