Organic single crystal scintillators are aromatic hydrocarbon compounds which contain benzene ring structures composed of carbon and hydrogen atoms. They can be used as fast-neutron scintillators in combination with photomultiplier tubes or silicon devices. At RMD we are working on several of these organic single crystal scintillators including 9,10-diphenylanthracene (DPA). A photograph of a DPA crystal grown at RMD is shown in the photograph below. DPA has a very fast luminescence decay of about 16 ns, a high light output of about 13,000 ph/MeV, and excellent neutron/gamma pulse shape discrimination. Organic single crystal scintillators are grown by the Bridgman technique or the solution growth method.
A single crystal of 9,10-diphenylanthracene (DPA).