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Conductivity induced in Polytetrafluoroethylene by X-rays

Abstract

IN the course of further measurements of conductivity induced in insulating materials by X–rays1,2, we have investigated polytetrafluoroethylene, and find a relatively large induced current with a very long time constant. A small cylindrical condenser 2.5 cm. long with polytetrafluoroethylene as the dielectric medium was used in a vacuum chamber for the measurements during irradiation. The current (down to 10−13 amp.) was measured with a Baldwin ‘Ionex’ Mk3 d.c. amplifier. The X-rays were generated at 220 kVp., with a half-value layer of 1.7 mm. of copper.

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References

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FOWLER, J., FARMER, F. Conductivity induced in Polytetrafluoroethylene by X-rays. Nature 174, 136–137 (1954). https://doi.org/10.1038/174136b0

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