Calibration and consistency of results of an ionization-chamber secondary standard measuring system for activity

Appl Radiat Isot. 2000 Mar;52(3):325-34. doi: 10.1016/s0969-8043(99)00173-6.


Calibration in terms of activity of the ionization-chamber secondary standard measuring systems at the PTB is described. The measurement results of a Centronic IG12/A20, a Vinten ISOCAL IV and a radionuclide calibrator chamber for nuclear medicine applications are discussed, their energy-dependent efficiency curves established and the consistency checked using recently evaluated radionuclide decay data. Criteria for evaluating and transferring calibration factors (or efficiencies) are given.