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Figure 2: Energy spectra of the electron beam of 6 MeV at the exit window (a) and the phantom surface (b) obtained by PENetration and Energy LOss of Positrons and Electrons

Figure 2: Energy spectra of the electron beam of 6 MeV at the exit window (a) and the phantom surface (b) obtained by PENetration and Energy LOss of Positrons and Electrons