title: A novel method for the preparation of large-area 90Sr/90Y sources for the calibration of hand contamination monitors.
abstract: This paper describes a method for the preparation of large-area (90)Sr/(90)Y polymer film sources for the calibration of hand contamination monitors. The process consists of solvent extraction of predictable quantity of (90)Sr 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 (90)Sr-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.
authors.affiliation: Radiopharmaceuticals Division, Bhabha Atomic Research Center, Trombay, Mumbai 400085, India.
authors.forename: Manoj
authors.initials: M
authors.lastname: Kumar
authors.forename: Shyamala S
authors.initials: SS
authors.lastname: Gandhi
authors.forename: Rubel
authors.initials: R
authors.lastname: Chakravarty
authors.forename: J
authors.initials: J
authors.lastname: Nuwad
authors.forename: J
authors.initials: J
authors.lastname: Udhayakumar
authors.forename: Ashutosh
authors.initials: A
authors.lastname: Dash
mesh_terms: D001345:Autoradiography; D002138:Calibration; D006225:Hand; D006801:Humans; D008855:Microscopy, Electron, Scanning; D011874:Radiometry / Q000379:methods*; D013052:Spectrometry, X-Ray Emission; D013326:Strontium Radioisotopes / Q000737:chemistry*; D015021:Yttrium Radioisotopes / Q000737:chemistry*
chemical_list: D013326:Strontium Radioisotopes; D015021:Yttrium Radioisotopes
keywords: Autoradiography; DCH18C6; PMMA; Solvent extraction