Fig. 1. Brief diagram of NaI (TI) crystal scintillator detector structure

Fig. 2. Description of whole-process simulation method

Fig. 3. Schematic diagram of visible light propagation model

Fig. 4. MCNP calculation model of NaI (TI) crystal probe

Fig. 5. Distribution of incident energy deposition at different angles

Fig. 6. Propagation trajectories of partial visible light in scintillator

Fig. 7. Visible light power parameters for crystal output at different incidence angles

Fig. 8. Circuit schematic diagram of NaI (TI) detector

Fig. 9. Pulse signal curve

Fig. 10. Fitting curve of normalized optical output