Computer Simulation and Analytical Solutions in the Study of the Transient Radiation-Induced Conductivity in Polymers

Various aspects of the kinetics of the radiation-induced conductivity in polymers, i.e. build-up and decay curves, non-linear dose rate effects, approach to the steady state are investigated by means of approximate analytical solutions as well as computer simulation for the case of exponential trap distribution (computer calculations are performed specifically for the case of dispersion parameter α = 0.5). The widest possible range of irradiation conditions is covered (pulse length 1 ns, 100 μs, 10 ps, 0.1 ms including the steady state; dose per pulse from zero to 105 Gy). The problem of the best choice of normalization parameters is also briefly discussed. Verschiedene Aspekte der Kinetik der strahlungsinduzierten Leitfahigkeit in Polymeren, d. h. die An-und Abklingkurven, nichtlineare Dosisrateneffekte, das Erreichen des stationaren Zustands, werden sowohl mittels analytischer Naherungslosungen als auch mit Computersimulation fur den Fall einer exponentiellen Haftstellenverteilung untersucht (die Computerberechnungen speziell fur einen Dispersionsparameter α = 0,5). Der weitestmogliche Bereich von Strahlungsbedingungen wird uberdeckt (Impulslange 1 ns, 100 ns, 10 ps, 0,1 ms einschlieslich des stationaren Zustands; Dosis pro Impuls reicht von Null bis 105 Gy). Das Problem der besten Wahl der Normierungs-parameter wird kurz diskutiert.

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