PEN scintillator films for the ionizing radiation identification and spectroscopy

Polyethylene 2.6-naphthalate (PEN) as a promising material for ionizing radiation detection have been taken recently into consideration. In this work various particles were detected by scintillation in PEN. Identification of these particles was based on the pulse shape discrimination: ratio of delayed fluorescence intensity with fast fluorescence component. Higher delayed fluorescence yield is induced by heavy ionizing particles, because different excitation energy relaxation pathways like triplet-triplet annihilation are possible.