Abstract
In order to measure the gamma dose more accurately than before, methods of spectrum-dose conversion have been in practice more often instead of count-dose conversion. There are two common methods that have been developed and published. They are the method of G(E) function and the method of unfolding spectrum. The method of G(E) function has been applied in the instrument, because it is easier to implement with limited resources of embedded computers. It is reported that the method of unfolding spectrum cannot only obtain the gamma dose, but also identify nuclides. In this paper these two methods were compared with each other using same initial data. The data was acquired by NaI(Tl) scintillation detectors and other relevant nuclear electronic instruments with three gamma radiation point sources 137Cs, 60Co and 152Eu. The simulation software Geant4 has been used in both methods to calculate the response function and matrix. Results were presented and compared with each other, and all relative deviations were better than 15%.
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