A reference system that would allow national laboratories to compare their activity measurements of non-gamma-emitting radionuclides at any time is currently being developed. The system requires a non-commercial reference-liquid scintillation cocktail, the development of which is described here. After preliminary testing of a number of cocktails, three cocktails were tested for suitability with seven different radionuclides. The best results were obtained with a cocktail consisting of p-xylene, 2-phenoxyethanol, PPO and bis-MSB, giving reasonable counting efficiencies and stable sources for 3H, 63Ni, 14C, 55Fe and 36Cl, but not for 89Sr and 90Sr/90Y. Further development will be undertaken to provide, in addition, stable strontium sources. A further aim is to optimise the XP ratio in terms of detection efficiency and source stability
Reference:
Van Wyn Gaardt, Wm, and Cassette, P. 2006. Development of a reference liquid scintillation cocktail. CSIR Research and Innovation Conference: 1st CSIR Biennial Conference, CSIR International Convention Centre Pretoria, 27-28 February 2006, pp1
Van Wyn Gaardt, W., & Cassette, P. (2006). Development of a reference liquid scintillation cocktail. http://hdl.handle.net/10204/2698
Van Wyn Gaardt, WM, and P Cassette. "Development of a reference liquid scintillation cocktail." (2006): http://hdl.handle.net/10204/2698
Van Wyn Gaardt W, Cassette P, Development of a reference liquid scintillation cocktail; 2006. http://hdl.handle.net/10204/2698 .
