Comparison of graphite-to-water absorbed-dose transfers for 60Co photon beams using ionometry and Fricke dosimetry.
To derive the absorbed dose to water from a standard of absorbed dose to graphite, the metrology laboratories which apply such a method usually make use of cavity ionization chambers as transfer instruments. In addition, the BNM-LPRI has tested, as such instruments, two types of Fricke dosimeter in its cobalt-60 beam. The two procedures are compared and their results are found to be in good agreement (the difference is less than 0.1%). Both procedures are then taken into account for the calculation of the reference value of absorbed dose to water.
Chauvenet
B
B
BNM-LPRI (Laboratoire Primaire des Rayonnements Ionisants), CEA/Saclay, Gif-sur-Yvette, France.
Baltès
D
D
Delaunay
F
F
D003037:Cobalt Radioisotopes / Q000627:therapeutic use; D006108:Graphite; D008962:Models, Theoretical; D017785:Photons / Q000627:therapeutic use; D011839:Radiation, Ionizing; D011874:Radiometry; D012016:Reference Values; D014867:Water
D003037:Cobalt Radioisotopes; D014867:Water; D006108:Graphite