This work presents the calibration for: 6, 8, 10, 12, 14, 15 and 18 MeV electron beams, also to 6 and 15 MV photons beams. Beams that are generated by an. Code of Practice entitled Absorbed Dose Determination in Photon and Electron. Beams (IAEA Technical Reports Series No. (TRS)), recommending. chambers in terms of absorbed dose to water (as opposed to TRS in terms of Note that the value of r provided in TRS was superseded by the.
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Evaluation of codes of practice: IAEA TRS, TRS, TRS|INIS
In this case, chamber dependent conversion factors are required to determine absorbed dose to water. These factors do not account differences between individual chambers of a particular type.
In other hand, the use of protocol with a more simple formalism reduces the possibility of errors. The measurements have been performed in two linear accelerators Clinac C Varianwith electron beams of nominal energies between 6 and 20 MeV, corresponding to R 50 from 2.
Two water phantoms have been used, one by NE including a waterproof sleeve for cylindrical ionization chambers with thickness about 0. The energy parameters characterizing the electron and photon beams have been obtained from measured depth dose distributions carried out by a plane parallel ionization chamber NACP.
In photon beams, absorbed dose to water has been determined at the reference tgs recommended in each protocol. Differences in the absorbed dose determined by the three protocols are less than 0.
In the case of N D,w,Qfor all plane parallel chambers, the differences are less than 0. Publication Year Publication Year. Reference Number Reference Number.
Division of Human Health
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