Thermal Variance Investigation of Cs 2 LiLa(Br,Cl)6:Ce

Elpasolites are a promising family of inorganic scintillators for dual-mode neutron and gamma-ray detection, often offering better gamma-ray energy resolution than traditional scintillators such as NaI, sensitivity to thermal neutrons through capture on ⁶ Li, and the ability to distinguish between neutron and gamma events through pulse shape discrimination (PSD). We have investigate the thermal variance of Cs ₂ LiLa(Br,Cl) ₆ :Ce (CLLBC), an elpasolite that exhibits better gamma-ray energy resolution and higher density than Cs ₂ LiYCl ₆ :Ce (CLYC), which is currently the most well-known elpasolite scintillator. By collecting digitized waveforms, we examine the thermal variation in CLLBC response to neutrons, gamma-rays, and alpha-particles from internal background.