Resumo

URENA-NUNEZ, F.  e  GALINDO, S.. Investigation of the electron paramagnetic resonance signal response in gamma-irradiated poly(lactic acid) for high-dose dosimetry. Rev. mex. fis. [online]. 2018, vol.64, n.5, pp.472-477.  Epub 30-Nov-2019. ISSN 0035-001X.

This paper is concerned with the investigation of the Electron Paramagnetic Resonance (EPR) signal response to Co60 gamma-ray radiation on poly(L-lactic acid) (PLA). The aim of this study is to assess the usefulness of PLA as a high-dose dosimeter. The EPR-signal response of PLA has been investigated to determine some of its dosimetric characteristics such as: signal intensity versus gamma dose received, zero-dose response, signal fading, signal repeatability, batch homogeneity, detection threshold, and stability under simulated sunlight exposure. It is concluded that PLA might be used as a high-dose dosimeter (10-500 kGy), with a very good reproducibility although its signal fading is about 9% in the first 5 hrs.

Palavras-chave : Poly(lactic-acid); gamma-irradiation; high-dose dosimeter; EPR ESR dosimetry; 76.30.Rn.

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