The activity of the pure beta-emitter phosphorus-33 (P-33) has been directly determined by the triple-to-double coincidence ratio (TDCR) efficiency calculation technique, thus extending the number of radionuclides that have been standardized by this simple, non-extrapolation liquid scintillation (LS) method. The major advantage of inherently accounting for chemical quenching without the need for additional external measurements is demonstrated. The P-33 solution activity concentration was verified by tracing with cobalt-60, utilizing 4pi(LS) beta-gamma coincidence counting. Agreement to within 1.2% confirmed the reliability of the TDCR measurements.
Reference:
Simpson, BRS and Morris, WM. 2004. Standardization of P-33 by the TDCR efficiency calculation technique. Applied Radiation and Isotopes, vol. 60, 04 February, pp 465-468
Simpson, B., & Morris, W. (2004). Standardization of P-33 by the TDCR efficiency calculation technique. http://hdl.handle.net/10204/1628
Simpson, BRS, and WM Morris "Standardization of P-33 by the TDCR efficiency calculation technique." (2004) http://hdl.handle.net/10204/1628
Simpson B, Morris W. Standardization of P-33 by the TDCR efficiency calculation technique. 2004; http://hdl.handle.net/10204/1628.
