title: Calibration and consistency of results of an ionization-chamber secondary standard measuring system for activity
abstract: 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.
authors.affiliation: Physikalisch-Technische Bundesanstalt, Braunschweig, Germany.
authors.initials: H
authors.lastname: Schrader