A novel method for the preparation of large-area 90Sr/90Y sources for the calibration of hand contamination monitors

This paper describes a method for the preparation of large-area 90Sr/90Y polymer film sources for the calibration of hand contamination monitors. The process consists of solvent extraction of predictable quantity of 90Sr into an organic solvent containing di-tert-butyl-cyclohexano-18-crown-6 (DCH18C...

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Bibliographic Details
Published in:Applied radiation and isotopes 2013-09, Vol.79, p.5-11
Main Authors: Kumar, Manoj, Gandhi, Shyamala S., Chakravarty, Rubel, Nuwad, J., Udhayakumar, J., Dash, Ashutosh
Format: Article
Language:English
Subjects:
Autoradiography
Calibration
DCH18C6
Hand
Humans
Microscopy, Electron, Scanning
PMMA
Radiometry - methods
Solvent extraction
Spectrometry, X-Ray Emission
Strontium Radioisotopes - chemistry
Yttrium Radioisotopes - chemistry
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Summary:This paper describes a method for the preparation of large-area 90Sr/90Y polymer film sources for the calibration of hand contamination monitors. The process consists of solvent extraction of predictable quantity of 90Sr into an organic solvent containing di-tert-butyl-cyclohexano-18-crown-6 (DCH18C6), formation of a polymeric solution of poly(methyl methacrylate) (PMMA), pouring the 90Sr-embedded polymer solution over a surface of a defined area followed by evaporation to create a thin film and peeling-off of the radioactive PMMA film. Quality control tests of the radioactive films were carried out to ensure nonleachability, uniform distribution of activity and stability. Sources having 5kBq±428Bq were prepared using this method and routinely used for calibration of contamination monitors. •Preparation of large-area 90Sr/90Y sources for the calibration of hand contamination monitors.•Extraction of 90Sr/90Y activity followed by preparation of a polymeric solution.•Pouring the radioactive polymer solution on a surface of a defined area.•Quality evaluation of the sources.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2013.04.021