Autor: Matheus Rebello do Nascimento, Josilene Cerqueira Santos, Eric Matos Macedo, Leonardo de Castro Pacífico, José Guilherme Pereira Peixoto

Resumo: X-ray detection systems require a deep analysis of their particularities and operational limitation. In that sense, measurements with solid-state detectors can present considerable distortions due to the interaction between the photons and the detector. Therefore, to overcome these distortions, the Stripping methodology correction is extensively discussed in this paper. To evaluate the performance of this methodology, the ISO 4037-1 narrow-spectrum series from N10 to N150 was measured using a CdTe diode and corrected for some physical effects that cause distortions. The corrected spectra were compared to SpekCalc analytical spectra, in terms of their shape and mean energy, as well as with the correction made by Santos (2013), a highly cited reference. It was observed that the differences between computed mean energy of corrected spectra for both approaches are inside of norm tolerance (5%), except for N150, where both shape and mean energy are slightly different, with an error of 6,5% by this work correction and 5,1% by Santos (2013). It should be mentioned that the shape of both corrected spectra converges qualitatively with those from SpekCalc, except for N120 and N150 where there is a longer low energy tail on both corrections. These results suggest that the Stripping method is suitable for the diagnostic energy range.

Download do Artigo