title: Correction factors for survey meter calibrations.
abstract: A factor is derived to correct the response of a large cylindrical air ionization chamber in the radiation field of a point-like calibration gamma-ray source. The calculated factor is compared with the observed response of commercially available instruments used for radiation safety surveys. It is concluded that proper use of the factor can improve the accuracy of survey meter calibrations when point-like standard sources are employed. Furthermore, it is shown how the design of a chamber can reduce the response error when using point-like sources for calibration.
mesh_terms: D002138:Calibration; D011874:Radiometry / Q000295:instrumentation*