Figure 7.

Relative energy resolution R_E = Σ_E/E of the LSO2 (black line) and BGO1 (red line) block detectors as a function of energy deposit E. Σ_E refers to the FWHM of the photopeak. The empirical fit to the experimental points is $R_{\text{E}}=(3.8\pm 0.3)\%/\sqrt{E/\text{MeV}}+(5.6\pm 0.3)\%$ for LSO2 and $R_{\text{E}}=(9.2\pm 0.5)\%/\sqrt{E/\text{MeV}}+(3.7\pm 0.4)\%$ for BGO1. Reproduced with permission from Ref. (53).