Author： Harish Kumar H.G. Mathad R. D. Sarma K. S. S. Sanjeev Ganesh Haramagatti C. R.
Publisher： Taylor & Francis Ltd
ISSN： 1042-0150
Source： Radiation Effects and Defects in Solids, Vol.166, Iss.3, 2011-03, pp. : 198-207
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Abstract
Poly(ethylene-co-vinyl acetate) (EVA) films were irradiated with a 1.2 MeV electron beam at varied doses over the range 0-270 kGy in order to investigate the modifications induced in its optical, electrical and thermal properties. It was observed that optical band gap and activation energy of EVA films decreased upon electron irradiation, whereas the transition dipole moment, oscillator strength and number of carbon atoms per cluster were found to increase upon irradiation. Further, the dielectric constant, the dielectric loss, and the ac conductivity of EVA films were found to increase with an increase in the dose of electron radiation. The result further showed that the thermal stability of EVA film samples increased upon electron irradiation.
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