Van Wyngaardt, WMSimpson, BRS2007-02-062007-06-072007-02-062007-06-072006-08-01Van Wyngaardt, WM, and Simpson, BRS. 2006. A simple counting technique for measuring mixtures of two pure beta-emitting radionuclides. Nuclear Instruments & Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, vol. 564(1), pp 339-3460168-9002http://hdl.handle.net/10204/1501http://hdl.handle.net/10204/1501A simple counting technique to measure mixtures of two pure beta-emitting radionuclides is described. The method is based on elements of two liquid scintillation techniques that are widely used to measure single-radionuclide solutions, namely the triple-to-double coincidence ratio (TDCR) efficiency calculation technique and the CIEMAT/NIST efficiency tracing method. Double- and triple-coincidence count rates, together with the figure-of-merit P determined from an external tracer, are used to extract the component activities of a source. A simulation was used to gauge the effect of counting statistics on the method's ability to extract a mixture composition under normal counting conditions and to validate derived uncertainty formulas based on counting statistics. The method is demonstrated experimentally for various mixture combinations of C-14 and Ni-63. It is shown that the accuracy of the technique can be enhanced by improving the determination of the figure-of-merit.218050 bytesapplication/pdfenCopyright: 2006 Elsevier Science BVPure beta-emitting radionuclidesTDCR efficiency calculationTriple-to-double coincidence ratioLiquid scintillation counterNuclear sciencesPhysicsArticleVan Wyngaardt, W., & Simpson, B. (2006). Simple counting technique for measuring mixtures of two pure beta-emitting radionuclides. http://hdl.handle.net/10204/1501Van Wyngaardt, WM, and BRS Simpson "Simple counting technique for measuring mixtures of two pure beta-emitting radionuclides." (2006) http://hdl.handle.net/10204/1501Van Wyngaardt W, Simpson B. Simple counting technique for measuring mixtures of two pure beta-emitting radionuclides. 2006; http://hdl.handle.net/10204/1501.TY - Article AU - Van Wyngaardt, WM AU - Simpson, BRS AB - A simple counting technique to measure mixtures of two pure beta-emitting radionuclides is described. The method is based on elements of two liquid scintillation techniques that are widely used to measure single-radionuclide solutions, namely the triple-to-double coincidence ratio (TDCR) efficiency calculation technique and the CIEMAT/NIST efficiency tracing method. Double- and triple-coincidence count rates, together with the figure-of-merit P determined from an external tracer, are used to extract the component activities of a source. A simulation was used to gauge the effect of counting statistics on the method's ability to extract a mixture composition under normal counting conditions and to validate derived uncertainty formulas based on counting statistics. The method is demonstrated experimentally for various mixture combinations of C-14 and Ni-63. It is shown that the accuracy of the technique can be enhanced by improving the determination of the figure-of-merit. DA - 2006-08-01 DB - ResearchSpace DP - CSIR KW - Pure beta-emitting radionuclides KW - TDCR efficiency calculation KW - Triple-to-double coincidence ratio KW - Liquid scintillation counter KW - Nuclear sciences KW - Physics LK - https://researchspace.csir.co.za PY - 2006 SM - 0168-9002 T1 - Simple counting technique for measuring mixtures of two pure beta-emitting radionuclides TI - Simple counting technique for measuring mixtures of two pure beta-emitting radionuclides UR - http://hdl.handle.net/10204/1501 ER -