Computation of Efficiencies of Organic Liquid Scintiliators

The results of the computation of the scintillation and fluorescence properties of 22 aromatic conjugated systems are presented. Some of these are expected to have superior properties to those in use at present. A new scintillation solute, 1,4-bis-(p-isopropylstyryl)-benzene, when used as a secondary solute in a p-terphenyl solution in xylene, has an efficiency higher than 80% on the anthracene scale.