Fig. 1. (a) Synthesis diagram of Li-doped plastic scintillator, (b) Sample of Li-doped plastic scintillator

Fig. 2. Schematic diagram of XEL spectroscopy measuring device in transmission mode

Fig. 3. XEL spectra of plastic scintillators with varied PPO content and XEL integral intensity show as a function of the PPO mass concentration (color online)

Fig. 4. XEL spectra of plastic scintillators with varied POPOP content and variation of XEL integral intensity with the POPOP mass concentration

Fig. 5. XEL spectra of plastic scintillators with varied AIBN content and XEL integral intensity show as a function of the AIBN concentration

Fig. 6. FTIR (a) and RS (b) of experimentally synthesized LiME

Fig. 7. Bulk plastic scintillators with a LiME content of 0%~12% at the sample size of ø33 mm×6 mm

Fig. 8. Optical transmittance (a) and XEL spectra (b) of plastic scintillator doped with 0%~12% LiME

Fig. 9. Photoluminescence & Photoluminescence spectra of 0% and 10% LiME doped plastic scintillators

Fig. 10. PHS of plastic scintillators doped with different mass fractions of LiME (0%~12%) （color online)