New standards of absorbed dose to water under reference conditions by graphite calorimetry for $^{60}$Co and high-energy x-rays at LNE-LNHB

Franck Delaunay (1) , Jean Gouriou (1) , J. Daures (1) , Maïwenn Le Roy (1) , Aimé Ostrowsky (1) , Benjamin Rapp (1) , S. Sorel (1)

1 LNHB - Laboratoire National Henri Becquerel

The LNE-LNHB has developed two primary standards to determine the absorbed dose to water under reference conditions (for 10 cm × 10 cm) in $^{60}$Co, 6 MV, 12 MV and 20 MV photon beams: a new graphite calorimeter and a water calorimeter. This first paper presents the results obtained with the graphite calorimeter and the new associated methodology. The associated relative standard uncertainty ($k$ = 1) of absorbed dose to water is 0.25% for $^{60}$Co and lies between 0.32% to 0.35% for MV x-ray beams.

Keywords: graphite; calorimetry; Optics; physics; absorbed dose; calorimeter; radiochemistry; high-energy X-rays

Domains: Physics [physics]; Nuclear Experiment [nucl-ex]

Franck Delaunay, Jean Gouriou, J. Daures, Maïwenn Le Roy, Aimé Ostrowsky, et al.. New standards of absorbed dose to water under reference conditions by graphite calorimetry for $^{60}$Co and high-energy x-rays at LNE-LNHB. Metrologia, 2014, 51 (5), pp.552 - 562. ⟨10.1088/0026-1394/51/5/552⟩. ⟨cea-01831912⟩