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Recent progresses in the realisation of graphite calorimeters for the measurement of the absorbed dose to water at ENEA-INMRI.

D'Arienzo M., Pinto M., Cappadozzi G., Guerra A.S., Pimpinella M.
  Lunedì 11/09   14:30 - 18:30   Aula A209   V - Biofisica e fisica medica
ENEA-INMRI's long standing expertise in the design, modelling and operation of graphite calorimeters has led to the recent realisation of two novel graphite-based primary standards for the measurement of absorbed dose to water: i) a graphite calorimeter for medium-energy x-ray filtered beams, capable of determining the absorbed dose to water with a standard uncertainty below 1.5%, and ii) a graphite calorimeter for ${}^{192}Ir$ sources used in high dose-rate brachytherapy, providing absorbed dose measurements with a combined standard uncertainty of about 1.4%. Both primary standards are described in detail in the present work, along with recent progresses in this area of research.