The Effect of Gamma Ray Source Nucl.137/LB905 Nom. Activity 3.7 MBq on a Photodiodes

 Abstract— This research aim to study the influence of gamma radiation on the structure of the photodiode and the current of the photodiode. Photodiodes have been irradiated at different distances to a dose of 3.7 MBq . Current and voltage has been measured several times at different distances during and after exposure and were presented in graphs. These diagrams show the influence of gamma radiation on photodiodes. The results show that gamma irradiation reduces the current of a photodiode. After exposure photodiodes have been recovered from the effects of radiation and Changes in photodiode current have been observed.