red 4034 are made from radiation-sensitive poly-methylmethacrylate (pmma) in the form of optically transparent pieces individually sealed in laminate sachets. they darken when irradiated,【敏感词】the radiation-induced darkening, accurately measurable by means of a spectrophotometer, is a function of the radiation dose ABSorbed. dose range
red 4034 has a functional dose range of 5 kgy to 50 kgy which makes it idea for a wide range of irradiation processes. material
the 4034 red is made from single batches of cast sheets of poly-methylmethacrylate (pmma) dimensions
harwell dosimeters then cut the sheets down into plaques of 30mm x 11mm with a thickness of 3mm (+/- 0.55mm) packaging
after 100％ inspection the dosimeters are packaged into sealed sachets made of polyester/aluminium foil/polyester/polyethylene laminate. with each sachet being labeled with a unique bar coded label.
packed 1,000 per carton.
(packing to defined aql's checked to bs6001 (iso 2859-1), single normal inspection, level ii.) measurement reproducibility
coefficient of variation of specific absorbance measurements on sets of dosimeters for the batch, simltaneously irradiated together, in a gamma radiation field uniform within +/- 1％, is 2％ over the entire calibrated range, 5 to 50 kgy. calibration quality
over the calibrated range, all mean specific absorbance data points thus obtained are within 2％ of a fourth-order polynomial least-squares fit to the data. shelf-life
ten years from the date of release. traceability
harwell calibration is traceable to the uk standard of absorbed dose at the national physical laboratory (npl).
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