High-symmetry organic scintillator systems

A scintillator system comprising:

• an organic scintillator having a rhombohedral or cubic symmetry selected from the group consisting of:
• tris(1-naphthyloxy)triethylamine,
• tris(1-naphthyloxy)triethylamine perchlorate,
• tris(1-naphthyloxy)triethylamine nitrate,
• tris(1-phenoxy)triethylamine,
• tris-1-(4-bromophenoxy)triethylamine,
• [tris(1-phenyloxy)triethylamine] perchlorate,
• tris-1-(biphenyloxy)triethyl amine,
• tris(dihydronaphthodioxin)phosphine oxide,
• tris(9-anthracenyl)phosphine,
• 1,3,5-tris(biphenyl)benzene, (4-bromo)hexaethyltruxene, and
• tris(dimesitylboryl)hexaethyltruxene;
• a photodetector optically coupled to the organic scintillator, the photodetector configured to generate electronic signals having pulse shapes characterized by fast and slow components of light emission by the organic scintillator in response to ionizing radiation;
• and
• a discriminator coupled to the photodetector, the discriminator configured to discriminate between different types of the ionizing radiation based on relative contributions of the fast and slow components to the pulse shapes.