Measurements of memory effect and resolution for an Al2O3 coated plastic scintillator used for radioxenon detection
(English)Manuscript (preprint) (Other academic)
A cylindrical plastic scintillator cell, used for radioxenon monitoring within the verification regime of the Comprehensive Nuclear-Test-Ban Treaty, has been coated with 425 nm Al2O3 using low temperature Atomic Layer Deposition, and its performance has been evaluated. The motivation is to reduce the memory effect caused by radioxenon diffusing into the plastic scintillator material during measurements, resulting in an elevated detection limit. Measurements of the coated detector show a resolution comparable to uncoated detectors, and a memory effect reduction of a factor of 1000. If these results are reproducible, and the quality of the detector is maintained for a longer period of time, the Al2O3 coating method is believed to be viable solution to the memory effect problem in question.
Plastic scintillator, Comprehensive Nuclear-Test Ban Treaty, Atomic Layer Deposition, Al2O3, Diffusion barrier, Radioxenon, Energy Resolution
Research subject Physics with specialization in Applied Nuclear Physics; Physics with spec. in Atomic, Molecular and Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-163280OAI: oai:DiVA.org:uu-163280DiVA: diva2:464094