title: Calibration and efficiency curve of SANAEM ionization chamber for activity measurements.
abstract: A commercially available Fidelis ionization chamber was calibrated and assessed in PTB with activity standard solutions. The long-term stability and linearity of the system was checked. Energy-dependent efficiency curves for photons and beta particles were determined, using an iterative method in Excel™, to enable calibration factors to be calculated for radionuclides which were not used in the calibration. Relative deviations between experimental and calculated radionuclide efficiencies are of the order of 1% for most photon emitters and below 5% for pure beta emitters. The system will enable TAEK-SANAEM to provide traceable activity measurements.
authors.affiliation: Turkish Atomic Energy Authority, Saraykoy Nuclear Research and Training Center (TAEK-SANAEM), Saray M., Atom Cd. No.27, Kazan, Ankara, Turkey. Electronic address: emin.yeltepe@taek.gov.tr.
authors.forename: Emin
authors.initials: E
authors.lastname: Yeltepe
authors.affiliation: Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, Braunschweig 38116, Germany.
authors.forename: Karsten
authors.initials: K
authors.lastname: Kossert
authors.affiliation: Turkish Atomic Energy Authority, Saraykoy Nuclear Research and Training Center (TAEK-SANAEM), Saray M., Atom Cd. No.27, Kazan, Ankara, Turkey.
authors.forename: Abdullah
authors.initials: A
authors.lastname: Dirican
authors.affiliation: Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, Braunschweig 38116, Germany.
authors.forename: Ole
authors.initials: O
authors.lastname: Nähle
authors.affiliation: Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, Braunschweig 38116, Germany.
authors.forename: Christiane
authors.initials: C
authors.lastname: Niedergesäß
authors.affiliation: Turkish Atomic Energy Authority, Saraykoy Nuclear Research and Training Center (TAEK-SANAEM), Saray M., Atom Cd. No.27, Kazan, Ankara, Turkey.
authors.forename: Namik
authors.initials: N
authors.lastname: Kemal Şahin
keywords: Energy-dependent efficiency curve; Ionization chamber calibration; Radionuclide calibrators; Secondary standardization of activity