Scintillation properties of large area composite stilbene scintillator for neutron detection

A composite polycrystalline stilbene scintillator of ¿ 200 mm × 20 mm was specially developed for fast neutron detection. These composite stilbene scintillators have advantages that can be used without special housing, and do not have any toxic. The neutron-gamma ray separation tests have been performed by neutron radiation source and compared with the single crystal stilbene. The neutron source used for this study is ²⁵²Cf and mono-energy fast neutrons by using the accelerator in Korea Institute of Geoscience and Mineral Resources (KIGAM). The measured results are compared to the response of a small size (¿25 mm × 20 mm) single crystal stilbene.