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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Fu, M. Chen, G. Dissado, L. A. Fothergill, J. C. Zou, C. |
| Copyright Year | 2007 |
| Description | Author affiliation: Department of Engineering, University of Leicester, Leicester, LE1 7RH, UK (Dissado, L. A.; Fothergill, J. C.; Zou, C.) || Department of Engineering, University of Leicester, Leicester, LE1 7RH, UK. E-mail: mf75@le.ac.uk (Fu, M.) || School of Electronics and Computer Science, University of Southampton, Southampton, SO17 1BJ, UK (Chen, G.) |
| Abstract | The influence of gamma irradiation on low-density polyethylene (LDPE) has been studied through space charge measurement and dielectric spectroscopy. Commercial LDPE film with a thickness of 100¿m was irradiated with ¿-rays at a dose rate of approximately 10kGy/h to different doses up to 100kGy in an atmosphere of air, vacuum and nitrogen respectively. Space charge profiles vary depending on irradiation environments and radiation dose. The space charge profile of a sample after irradiation at 100kGy in air is more complicated than those irradiated in vacuum and nitrogen at same dose. More importantly, the space charge decay rate for the irradiated samples is slower than that of the virgin sample, indicating that the irradiation had changed the material by the generation of deep traps for space charge. Irradiation in air also produced changes in the dielectric spectrum in the frequency range between 10¿3Hz and 106Hz where the imaginary part of the permittivity was found to be about one order of magnitude higher than that of the virgin sample (~10¿4). This was attributed to oxidation as samples with the same (or lower) radiation dose in vacuum or nitrogen showed no pronounced difference to that of virgin samples. |
| Starting Page | 442 |
| Ending Page | 445 |
| File Size | 1904221 |
| Page Count | 4 |
| File Format | |
| ISBN | 1424407508 |
| DOI | 10.1109/ICSD.2007.4290846 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-07-08 |
| Publisher Place | UK |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Space charge Electrochemical impedance spectroscopy Polyethylene Nitrogen Atmospheric measurements Current measurement Dielectric measurements Charge measurement Atmosphere Dielectric materials |
| Content Type | Text |
| Resource Type | Article |
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