Alpha particle counting system at SANAEM. Preliminary measurements as a part of validation studies

Alpha-particle counting at a defined solid angle (DSA) is one of the most accurate methods used in the primary activity standardization of alpha-particle emitting radionuclides. The important features of the technique are geometrically calculated efficiency and low background energy spectra. This paper describes measurement conditions of the DSA counter installed at Turkish Atomic Energy Authority - Sarayköy Nuclear Research and Training Center (TAEK-SANAEM) and source preparation apparatus. Details of source preparation, preliminary work of measurement and solid angle calculations are explained. The standardization of the activity of 241Am sources with detailed uncertainty analysis is reported as part of a validation of the method. •Measurement setup conditions of first DSA and source preparation at TAEK-SANAEM.•Source preparation by drop deposition technique.•Solid angle calculation.•Main components of measurement uncertainty of Alpha-particle counting at DSA are presented.