Experimental Study of the Gamma Component in the Rhodium SPD Signal

A primary comprehensive experimental study of the contribution of reactor gamma radiation to the total signal of an SPD with a rhodium emitter was performed. This contribution was assessed by comparing the signals of a rhodium SPD and the same SPD with a palladium emitter, since palladium has similar electron-photonic properties to rhodium, but it lacks the beta decay of neutron activation products, which is the main component of the useful signal of a rhodium SPD. Primary tests comparing the signals of two SPD were carried out at the IR-8 research reactor. To confirm the assumption that the electron-photon properties of rhodium and palladium SPD are similar, special measurements were performed on the GUT200m gamma installation.