Condutividade induzida por radiação ionizante no Mylar (PET) e Kapton (polimiidia). / Radiation-induced conductivity in Mylar (PET) and Kapton (polymide)
AUTOR(ES)
Rinaldo Gregório Filho
DATA DE PUBLICAÇÃO
1986
RESUMO
In this work we present extensive results of measurements of the prompt and delayed radiation-induced conductivity of samples of PET and Kapton. Experimental parameters, such as the effective energy of the radiation, the exposure rate, the total dose, the value of the applied electric field, the nature of the electrodes, and the ambienta1 conditions were changed within wide limits. We also report measurement of thermally stimulated currents for non-irradiated and for irradiated samples which allowed us to investigate the trap-structure of the materials. Measurements of photo-Compton currents with different electrode materials and sample thicknesses gave information about the relation between the nature of the electrodes and the amplitudes of the currents. Based on the generalized rate theory of radiation-induced conduction we developed a theoretical model which includes the effect of the applied electric field on the carrier generation yield (geminate recombination, Onsager effect). Comparison of experimental and theoretical curves allowed us to determine the values of the main conduction parameters, such as carrier mobility, recombination coefficient, trap densities, for the materials under investigation.
ASSUNTO(S)
polymide pet onsager effect condutividade induzida por radiação raios-x geminate recombination efeito onsager radiation-induced conductivity pet poliimida recombinação geminativa
