Free radicals in gamma-irradiated polyamide 6 from the point of view of chemical ESR-dating
✍ Scribed by Szőcs, Ferenc
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 29 KB
- Volume
- 263
- Category
- Article
- ISSN
- 0003-3146
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✦ Synopsis
Polyamide 6 was irradiated with gamma rays in air at room temperature with a radiation dose of 17 kGy. The arising composite spectrum indicates the presence of two types of free radicals. The ratio of spectral lines was measured for the time period of 45 days. As the rate constants of decay of individual types of free radicals are different, the intensity ratio of lines of the composite spectrum significantly changes in the course of decay. It has been pointed out that this temporal dependence of the line ratio can be used for determining the time interval between the radiation impact and the measurement of ESR spectrum. The possibilities of using this information for the purpose of retrospective chronodosimetry are discussed. ZUSAMMENFASSUNG: Polyamid 6 wurde mit Gammastrahlen in Luft und bei Raumtemperatur mit einer Dosis von 17 kGy bestrahlt. Das ESR-Spektrum der Probe deutet auf die Anwesenheit von zwei Arten freier Radikale hin. Das Verha ¨ltnis der Intensita ¨ten der Spektrallinien wurde in einem Zeitraum von 45 Tagen gemessen. Da die Geschwindigkeitskonstanten