Comparisons organized by Ionizing Radiation Metrology Laboratory of FTMC, Lithuania.

Abstract The newly established Ionizing Radiation Metrology Laboratory of the National Metrology Institute (FTMC) in Lithuania organized four comparisons in the field of low-level radioactivity measurements in water. For gamma-ray emitters, the activity concentration in the samples was in the range 1–25 Bq/kg, while for tritium it was around 2 Bq/g. The assigned values of all comparisons were traceable to the primary standards of the Czech Metrology Institute (CMI).