Standardization of 125I and 109Cd by the photon–photon coincidence method in PTKMR-BATAN

Calibration of HPGe–HPGe coincidence spectrometer through performing standardisation of 125 I activity by X-ray-gamma coincidence spectrometry using two HPGe detectors

“…Pommé et al [6] described and used seven techniques for 125 I solution standardisation. If we limit only to photon detection, two methods most widely used are photon-photon coincidence counting and the sum peak coincidence method [7][8][9][10][11][12][13]. In photon-photon coincidence counting method two NaI(Tl) detectors are used to identify coincidence events between X-rays originating from 125 I EC and gamma-rays or X-rays 58 originating from the 125 Te de-excitation (isomeric transition).…”