Pulse shape discrimination performance of a meter-long liquid scintillator bar

The organic scintillators (both Plastic and Liquid forms) are widely used as large area detectors in high energy physics. The response of organic scintillators is quite fast with the decay time of few ns or less. Scintillation in such compounds arises from transitions made by the free valance electrons of the molecules. In this work, we have studied the performance of PSD for liquid scintillator bars. The PSD tuning has been done to obtain the best FoM among different combinations of Long and Short gates. The study concluded that the optimal values for Short Gate = 38 ns and Long Gate = 400 ns for these liquid scintillator bars, which can be further used in the future to understand the composition of cosmogenic particles