Title

Effect of post-irradiation storage condition on thermoluminescence from ultra-high molecular weight polyethylene

Abstract

The effect of post-irradiation storage conditions such as liquid nitrogen (LN), saline solution at 37°C, and a dry atmosphere at RT on thermoluminescence (TL) from ultra-high molecular weight polyethylene (UHMWPE) has been investigated. A broad TL glow curve with peaks near 140 and 220°C was observed from the samples stored in LN. In the TL from the samples stored in saline solution or a dry atmosphere, the 140°C peak disappeared and a new peak near 240°C appeared. Electron spin resonance (ESR) measurements suggest that oxygen diffusion and subsequent quenching of free radicals (alkyl type) are the major cause of the disappearance of the 140°C peak, and that the thermal decay of the more stable free radicals (allyl type) produces glow peaks near 220 and 240°C. © 1988.

Publication Title

Journal of Luminescence

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