Evaluation of synthesis conditions for plastic scintillation foils used to measure alpha- and beta-emitting radionuclides

Abstract

Plastic scintillation foils of polystyrene and polycarbonate with a thickness between 45 and 200 µm, have been produced using the solvent evaporation method. PSfoils presented a reproducible thickness (10-20%). PSfoils were characterized by the measurement of 36 Cl or 241 Am. For 36 Cl spectrum is located at medium energies since not all energy is deposited in the scintillator and not all betas interact with the foils. For 241 Am the efficiency values are very high and spectrum is a sharp peak located at high energies. 222 Rn absorption (LD and K) and desorption capacities of the PSfoils have been also evaluated.

Attempting to prepare a plastic scintillator from a biobased polymer

“…All these materials are prepared in the same way, that is to say the thermally induced radical polymerization of the corresponding monomer to the polymer. Hence, starting the preparation directly from the polymer is rather unusual and is typically encountered when scintillators are prepared either from extrusion of polymer pellets, for thin film or microsphere production, or more recently by 3D‐printing techniques …”

Rapid Prototyping Lab-on-Chip Devices for the Future: A Numerical Optimisation of Bulk Optical Parameters in Microfluidic Systems

“…Most microfluidic radionuclide detector prototypes place the detector on top of the microfluidic channels [13,30,34,35] to expose the detector to as much fluid surface area as possible. In contrast, some High Energy Physics (HEP) applications have successfully placed the multi-anode PMTs perpendicular to metallised channels acting as optical waveguides [31,32].…”

“…The most common radiometric LoCs detection method is optical, utilising either the Cherenkov effect or scintillation-based methods for photon production [29][30][31][32]. Factors affecting overall sensor efficiency, including detector performance [12], scintillator efficiency [33,34], and microfluidic chip materials [13], have already been considered elsewhere [13,14,35,36]. Cho et al previously [37] assessed the impact of channel geometry on overall sensor efficiency in the context of a radiometric LoC system for 18 F-labeled compounds.…”