Abstract

The results are reported of an investigation carried out to determine the suitability of using a low cost commercially available silicon photodiode as a high energy electron dosemeter. Measurements of the photodiode dose response were performed in a 10 MV linear accelerator. The results showed that the photodiode response is highly linear in the dose range studied. The mean energy of the electrons at the surface of the phantom and their mean range were determined from the experimental data and compared with the results obtained with a parallel plate ionisation chamber. The relative deviation of 0.8% between the two sets of data, as well as the reproducibility of the results show the viability of using the photodiode as an electron dosemeter.

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