Fluorescence Emission and Decay Time Studies on Doped 1, 3, 5-Triphenylbenzene Scintillator Crystal Grown by Solution Growth Technique

Detection of fast neutrons in the presence of gamma radiation background is possible in the existence of two decay fluorescence of organic molecules. Doped organic molecules are enhancing the fluorescence emission and decay time which enables the large events of neutron-gamma detection. The present work is investigate the organic scintillator crystal 1,3,5-triphenylbenzene (3PB) doped with 1,4-diphenyl-1,3-butadiene (DPB) and 2,5-diphenyloxzole (PPO) with different concentration of mole percentage ratios (0.01, 0.03, 0.05, & 0.07). The fluorescence emission and decay time studies were carried out which reveals that importance of growing 3PB scintillator crystal. Among the four different concentrations, 0.01mol% of DPB and 0.05mol% of PPO obtained the maximum emission intensity. Fluorescence decay time was calculated by time-correlated single photon counting (TCSPC) method which reveals the reduction of decay time compare to pure 3PB and other organic scintillators.