Abstract
We demonstrate the feasibility of the production of isotopically-enriched gadolinium oxysulfide scintillator screens for the high spatial-resolution neutron imaging. Approximately 10g of 157Gd2O2S:Tb was produced in the form of fine powder (particle size approximately 2µm). The level of 157Gd enrichment was above 88%. Approximately 2.5µm thick 157Gd2O2S:Tb scintillator screens were produced and tested for the absorption power and the light output. The results are compared to the reference screens based on natGd2O2S:Tb. The isotopically enriched screens provided increase by a factor of 3.8 and 3.6 for the absorption power and the light output, respectively. The potential of the scintillator screens based on 157Gd2O2S phosphor for the purpose of the (high-resolution) neutron imaging is discussed.
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