Patent ID: 8735843

Claim:
A material exhibiting an optical response signature for neutrons that is different than an optical response signature for gamma rays, said material exhibiting performance comparable to or superior to stilbene in terms of distinguishing neutrons from gamma rays, wherein the material is not stilbene, the material comprising a molecular motif selected from a group consisting of: two or more benzene rings, one or more benzene rings with a carboxylic acid group, one or more benzene rings with at least one double bond adjacent to at least one of the one or more benzene rings, and one or more six-member rings comprising: carbon atoms; and at least one non-carbon atom, wherein each atom in each six-member ring is double-bonded to one other atom in the six-member ring, and wherein the material is in the form of a crystal having physical characteristics of formation from solution, the physical characteristics including faceted growth on at least one face of the crystal.