具有生长子代的钍的活度标准与校准
Activity standard and calibrations for Th with ingrowing progeny.
作者信息
Bergeron Denis E, Cessna Jeffrey T, Broder Brittany A, Pibida Leticia, Fitzgerald Ryan P, DiGiorgio Morgan, Napoli Elisa, Zimmerman Brian E
机构信息
Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
出版信息
Appl Radiat Isot. 2024 Jul;209:111326. doi: 10.1016/j.apradiso.2024.111326. Epub 2024 Apr 20.
Thorium-227 was separated from its progeny and standardized for activity by the triple-to-double coincidence ratio (TDCR) method of liquid scintillation counting. Confirmatory liquid scintillation-based measurements were made using efficiency tracing with H and live-timed anticoincidence counting (LTAC). The separation time and the efficiency of the separation were confirmed by gamma-ray spectrometry. Calibrations for reentrant pressurized ionization chambers, including commercial radionuclide calibrators, and a well-type NaI(Tl) detector are discussed.
钍-227与其子体分离，并通过液体闪烁计数的三对双符合比（TDCR）方法对其活度进行标准化。使用H效率追踪和实时反符合计数（LTAC）进行基于液体闪烁的验证测量。通过伽马射线能谱法确定分离时间和分离效率。讨论了包括商用放射性核素校准器在内的凹型加压电离室和井型碘化钠（铊）探测器的校准。
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