High-level gamma dosimetry using potassium bichromate

Gommaer De Baere, M.J. De Proost, T.K. Van Elsen

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    A chemical dosimeter using K2Cr2O7 in a diluted sulphuric acid solution is described. The decrease in optical density caused by the reduction of potassium bichromate is measured spectrophotometrically at a wave-length of 350 nm or 440 nm depending on the initial K2Cr2O7 concentration.
    The yields of the radiolytical reduction in a 1 N sulphuric acid solution are : for 1.5 x 10-3 M K2Cr2O7 : 0.390 ± 0.010 ; for 2.5 x 10-4 M K2Cr2O7 : 0.408 ± 0.012. These G values are independent of dose rate, but they depend on the H+ concentration.
    The potassium bichromate dosimeter usable for absorbed doses between 105 and 3x106 rad permits the determination of gamma fluxes up to 5x107 rad/h.
    Original languageEnglish
    PublisherSCK CEN
    Number of pages13
    StatePublished - Oct 1966

    Publication series

    NameSCK CEN Reports
    PublisherSCK CEN

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