Analysis of 161Tb by radiochemical separation and liquid scintillation counting
- AWE plc, Reading (United Kingdom)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
The determination of 161Tb activity is problematic due to its very low fission yield, short half-life, and the complication of its gamma spectrum. At AWE, radiochemically purified 161Tb solution was measured on a PerkinElmer 1220 QuantulusTM Liquid Scintillation Spectrometer. Since there was no 161Tb certified standard solution available commercially, the counting efficiency was determined by the CIEMAT/NIST Efficiency Tracing method. The method was validated during a recent inter-laboratory comparison exercise involving the analysis of a uranium sample irradiated with thermal neutrons. Lastly, the measured 161Tb result was in excellent agreement with the result using gamma spectrometry and the result obtained by Pacific Northwest National Laboratory.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1250858
- Journal Information:
- Applied Radiation and Isotopes, Vol. 117, Issue C; ISSN 0969-8043
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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