We report on the operation and characterization of a new ionization chamber system, called AUTOIC, featuring a commerical digital electrometer and a commerical robotic sample changer. The ralative accuracy of the electrometer was improved significantly beyond the manufacturer's specifications through an in-house calibration of the various ranges, applied via software. The measurement percision and repeatability of the system have been determined by measuring multiple samples of the same radionuclide over the span of two or three years. The linearity of the system was examined by following the decay of Tc-99m, Mo-99 and Xe-133 sources for up to 19 half-lives and determining half-life values. All of these values agree with the accepted literature values, within their combined, small, uncertainties.
Citation: Applied Radiation and Isotopes
Pub Type: Journals
ionization chamber, radioactivity