Measurements of memory effect and resolution for an Al2O3 coated plastic scintillator used for radioxenon detection

• 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.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Nyckelord

Plastic scintillator

Comprehensive Nuclear-Test Ban Treaty

Atomic Layer Deposition

Al2O3

Diffusion barrier

Radioxenon

Energy Resolution

Fysik med inriktning mot tillämpad kärnfysik

Physics with specialization in Applied Nuclear Physics

Physics with spec. in Atomic, Molecular and Condensed Matter Physics

Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik

Publikations- och innehållstyp

vet (ämneskategori)

ovr (ämneskategori)