RADIATION-INDUCED CONDUCTIVITY IN TEFLON IRRADIATED BY X-RAYS

被引:69
作者
GROSS, B [1 ]
FARIA, RM [1 ]
FERREIRA, GFL [1 ]
机构
[1] BELL TEL LABS INC,MURRAY HILL,NJ 07974
关键词
Electric conductivity - X-rays;
D O I
10.1063/1.328824
中图分类号
O59 [应用物理学];
学科分类号
摘要
Measurements of radiation-induced conductivity of Teflon FEP (polyfluorethylene propylene) foils irradiated by x-rays at atmospheric pressure are reported. The current induced by irradiation of the poled dielectric at exposure rates of the order of 10**2 R/s, initially increases with time for 10-20 s, reaches a maximum, and subsequently decreases. After an irradiation time of about 1 h, a steady-state value is attained which is of the order of 25% of the maximum current. The dependence of the current amplitudes on exposure rate, of the delayed component of induced conductivity, and of the behavior of samples which had been irradiated in short-circuit before poling have been measured. Radiation-induced polarization effects or space-charge formation could not be detected. The behavior of the current-time curves is interpreted in terms of a theory of unipolar (hole) conduction.
引用
收藏
页码:571 / 577
页数:7
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