Analysis and comparison of the Core-to-Valence Luminescence mechanism in a large CLYC crystal under neutron and γ-ray irradiation through optical filtering selection of the scintillation light

• Neutron/γ–ray discrimination via optical light filtration instead of PSD methods. Study the CVL in CLYC: an ultra-fast mechanism emitting deep-near UV. Correlation between time and wavelength domain scintillation light. RL spectra with TCSPC technique a fast PMT results. LET dependence quenching effect on emission CLYC. 7 Li enriched Cs 2 LiYCl 6 :Ce 3+ (CLYC) is promising inorganic scintillator for real-time γ-ray neutron spectrometry. The neutron/γ-ray usually accomplished exploiting different effects high Linear Energy Transfer (LET) particles mechanisms, by means analysis pulse shape. In principle, information could be used to address same task. However, systematic study correlations CLYC decay time, its radio-luminescence spectrum impinging particle has not yet been performed. We therefore investigated process under irradiation, correlating response using 1–inch right cylinder>99% found that relative intensity Core Valence Luminescence (CVL) almost constant photons energy range 20–660 keV, i.e. 0.5–5 keV/μm LET, only partially quenched neutrons. Instead, direct electron-hole capture completely cut irradiation. luminescence deep-Ultraviolet Near Ultraviolet region (250–350 nm) might attributed both host luminescence, also thick highly Ce -doped crystals.