A Dual Layer Scintillation Microdevice for Gamma and Beta Particle Energy Spectroscopy

This paper reports on a multichannel radiation detector capable of energy spectroscopy of beta and gamma radiation. The scintillation microdevice consists of a double layer array of two patternable scintillating polymer films stacked with different optical decay constants. The top patterned layer of the detector has a small decay constant and is doped with tailored charge conversion nanoparticles to produce different optical pulses specific to the radiation species. The decay constant of the bottom patterned layer is orders of magnitude larger which produces different optical pulses that are measured by an off the shelf photo-multiplier (PM) tube.