Title :
Positron annihilation and electrical conduction of irradiated polymer
Author :
Fujita, S. ; Baba, M. ; Shinyama, K. ; Suzuki, T.
Author_Institution :
Dept. of Electr. Eng., Hachinohe Inst. of Technol., Japan
Abstract :
Positron lifetime measurements were applied to electron beam irradiated poly(ether-ether-ketone). The lifetime, τ3, of the ortho-positronium became rapidly longer from about 150°C. The intensity, I3 increased monotonously with increasing the temperature. τ3 of the unirradiated specimen was similar to that of 5 MGy irradiated one, and I3 of the unirradiated specimen was a little larger than that of 5 MGy irradiated one. It was shown that electron beam irradiation and temperature affect the positronium formation. The conduction current increased rapidly between 160°C and 170°C. The conduction current of the unirradiated specimen was smaller than that of the 5 MGy irradiated one, however, it was larger than that of 50 MGy irradiated one. The correlation between the results of positron annihilation and electrical conduction was investigated
Keywords :
electrical conductivity; electron beam effects; polymer films; positron annihilation; positronium; 150 to 170 C; PEEK films; conduction current; electrical conduction; electron beam irradiated poly(ether-ether-ketone); electron beam irradiation; irradiated polymer; lifetime; ortho-positronium; positron annihilation; positron lifetime measurements; positronium formation; temperature dependence; unirradiated specimen; Amorphous materials; Conducting materials; Current measurement; Electrodes; Electron beams; Lifetime estimation; Plastic insulation; Polymers; Positrons; Temperature dependence;
Conference_Titel :
Conduction and Breakdown in Solid Dielectrics, 1995. ICSD'95., Proceedings of the 1995 IEEE 5th International Conference on
Conference_Location :
Leicester
Print_ISBN :
0-7803-2040-9
DOI :
10.1109/ICSD.1995.522949
