液体闪烁计数
校准
蒙特卡罗方法
巧合
核物理学
计数效率
物理
闪烁
放射性核素
放射化学
计算物理学
化学
光学
统计
数学
探测器
医学
替代医学
病理
量子力学
作者
Denis E. Bergeron,Jeffrey T. Cessna,Ryan Fitzgerald,Lizbeth Laureano-Pérez,L. Pibida,Brian E. Zimmerman
标识
DOI:10.1016/j.apradiso.2022.110473
摘要
An activity standard for 212Pb in equilibrium with its progeny was realized, based on triple-to-double coincidence ratio (TDCR) liquid scintillation (LS) counting. A Monte Carlo-based approach to estimating uncertainties due to nuclear decay data (branching ratios, beta endpoint energies, γ-ray energies, and conversion coefficients for 212Pb and 208Tl) led to combined standard uncertainties ≤ 0.20 %. Confirmatory primary measurements were made by LS efficiency tracing with tritium and 4παβ(LS)-γ(NaI(Tl)) anticoincidence counting. The standard is discussed in relation to current approaches to 212Pb activity calibration. In particular, potential biases encountered when using inappropriate radionuclide calibrator settings are discussed.
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