Comparison of graphite-to-water absorbed-dose transfers for Co photon beams using ionometry and Fricke dosimetry
- 1 November 1997
- journal article
- research article
- Published by IOP Publishing in Physics in Medicine & Biology
- Vol. 42 (11) , 2053-2063
- https://doi.org/10.1088/0031-9155/42/11/004
Abstract
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.Keywords
This publication has 10 references indexed in Scilit:
- Photon mass attenuation and energy-absorption coefficientsPublished by Elsevier ,2002
- A brief look at absorbed dose measurements in the 60Co fieldNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1995
- Wall‐correction and absorbed‐dose conversion factors for Fricke dosimetry: Monte Carlo calculations and measurementsMedical Physics, 1993
- Ionometric determination of absorbed dose to water for cobalt-60 gamma raysPhysics in Medicine & Biology, 1993
- Fraction of ionization from electrons arising in the wall of an ionization chamberMedical Physics, 1983
- A formalism for calculation of absorbed dose to a medium from photon and electron beamsMedical Physics, 1981
- Ionization Chamber Dosimetry for Photon and Electron BeamsActa Radiologica: Therapy, Physics, Biology, 1977
- Spectrum perturbation and energy deposition models for stopping power ratio calculations in general cavity theoryPhysics in Medicine & Biology, 1974
- The effect of the wall on the Fricke dosemeterThe International Journal of Applied Radiation and Isotopes, 1969
- A General Theory of Cavity IonisationThe British Journal of Radiology, 1966