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<dc:title xml:lang="en">Alanine/EPR dosimetry for low to medium energy X-ray radiation processing control</dc:title>
<dcterms:alternative xml:lang="fr">Dosimétrie Alanine/RPE pour le contrôle du procédé d’irradiation par rayons X de faible à moyenne énergie</dcterms:alternative>
<dc:subject xml:lang="fr">Alanine/RPE</dc:subject>
<dc:subject xml:lang="fr">Dose absorbée dans l’eau</dc:subject>
<dc:subject xml:lang="fr">Simulations Monte Carlo</dc:subject>
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<dc:subject xml:lang="en">Absorbed dose to water</dc:subject>
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<tef:elementdEntree autoriteExterne="034762000" autoriteSource="Sudoc">Rayonnements ionisants -- Applications industrielles</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">L’irradiation par des rayons X de faible à moyenne énergie devient de plus en plus une technique répandue qui remplace des irradiations réalisées par des sources radioactives pour différentes applications telles que l’irradiation du sang, les traitements Sterile Insect Technology et la décontamination des produits alimentaires. Afin de s’assurer que la bonne dose est délivrée au produit, un dosimètre est placé sur ce dernier. Un type de dosimètres utilisé pour ces applications est le dosimètre à l’alanine, qui est équivalent à l’eau dans le cas des photons d’énergie supérieure à 200 keV. Cette thèse présente l’utilisation de l’alanine pour le control et la validation des process d’irradiations réalisés avec des rayons X de faible à moyenne énergie, ainsi que différentes méthodes développées pour déterminer des facteurs correctifs à appliquer à la réponse de ce dosimètre. Ces méthodes reposent sur des mesures expérimentales, des simulations Monte Carlo et des calculs analytiques.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Nowadays, low to medium energy X-ray irradiators are starting to replace irradiators using radioactivesources, mainly in the fields of blood irradiations, Sterile Insect Technique and food irradiations. A dosimeter is placed on the irradiated product to ensure that the desired dose is well delivered. One of the dosimetry systems that is used in radiation processing is the alanine/EPR dosimetry system. Alanine is considered as water equivalent, from a dosimetric point of view for photon energies that are higher than 200 keV. However, it loses its water equivalency for lower photon energies.This thesis presents the use of alanine for the control and validation of irradiation processes performed with low to medium energy X-rays, as well as different methods developed to determine corrective factors to be applied to the response of this dosimeter. These methods are based on experimental measurements, Monte Carlo simulations and analytical calculations.</dcterms:abstract>
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