Standardization of Sm-153 solution by absolute methods

• Published in: Applied radiation and isotopes Vol. 87; pp. 19 - 23
• Main Authors: Dziel, T., Broda, R., Ziemek, T., Muklanowicz, A., Listkowska, A.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.05.2014
• Subjects: CIEMAT/NIST; Coincidence and anticoincidence; Counting efficiency; Half-Life; Humans; Liquid scintillation counting; Reference Standards; Samarium - analysis; Samarium - pharmacokinetics; Samarium - standards; Sm-153; Solutions; Uncertainty; Liquid scintillation counting; Coincidence and anticoincidence; Sm-153; Half-life; Counting efficiency; CIEMAT/NIST
• ISSN: 0969-8043; 1872-9800
• DOI: 10.1016/j.apradiso.2013.11.054

Standardization of 153Sm by 4π(LS)-γ coincidence and anticoincidence counting and the CIEMAT/NIST method in three LS-counters is presented. This short half-life radionuclide is applied in tumor therapy and bone pain palliation. A simplified disintegration scheme of 153Sm was applied in the calculation of the counting efficiency. Standard uncertainties of 0.4% for the 153Sm measurements by the 4π(LS)-γ coincidence and anticoincidence techniques and 0.7% by the C/N method were evaluated, respectively. An agreement of the standardization results by both methods within the respective uncertainties was obtained. The half-life of 153Sm of (1.92895±0.00024) days was determined during one month of measurements and correction for europium isotope impurities by the C/N method in the TriCarb 2910 LS-counter. •Counting efficiency of 153Sm was calculated with simplified spectrum.•Consistency of 153Sm standardization by two absolute methods was obtained.•Uncertainty of measurement of 0.7% by the C/N method was evaluated.•Half-life of 153Sm of (1.92895±0.00016) days was determined.