title: Radon leakage as a source of additional uncertainty in simultaneous determination of ²²⁶Ra and ²²⁸Ra by gamma spectrometry--validation of analysis procedure.
abstract: A series of validation experiments was carried out to assess robustness, repeatability, and trueness of an analysis procedure for simultaneous determination of (226)Ra and (228)Ra in water samples. The study revealed instabilities in the radon holding capacity of the sample matrix (epoxy resin). The discovered effect is a new additional component in the uncertainty budget which should be considered when (226)Ra is measured via its progeny in similar sample matrices.
authors: Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia. Electronic address: siiri.suursoo@ut.ee.
authors: Siiri
authors: S
authors: Suursoo
authors: Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia.
authors: Madis
authors: M
authors: Kiisk
authors: Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia.
authors: Antonio
authors: A
authors: Semakalu
authors: Institute of Physics, University of Tartu, Riia 142, 51014 Tartu, Estonia.
authors: Kadri
authors: K
authors: Isakar
keywords: Gamma spectrometry; Radium isotopes; Radon leakage